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Trigonometric Ratio

Collection of board questions from 2020 to 2025 across all 9 education boards.

194 MCQs
53 Creative Questions

Creative Questions (CQ)

Barisal Board 2025
CQ5 Creative
Stem: A ladder 10 m long leans against a wall making an angle of 60° with the ground.
উদ্দীপক: 10 মি দীর্ঘ একটি মই মাটির সাথে 60° কোণ করে দেয়ালে ঠেকানো আছে।
Chapter: Trigonometric Ratio
Chittagong Board 2025
CQ5 Creative
Stem: A tree 15 m tall casts a shadow of length \(15\sqrt{3}\) m on the ground.
উদ্দীপক: 15 মি উঁচু একটি গাছের ছায়া মাটিতে \(15\sqrt{3}\) মি দীর্ঘ।
Chapter: Trigonometric Ratio
Comilla Board 2025
CQ5 Creative
Stem: A ladder 10 m long leans against a wall making an angle of 60° with the ground.
উদ্দীপক: 10 মি দীর্ঘ একটি মই মাটির সাথে 60° কোণ করে দেয়ালে ঠেকানো আছে।
Chapter: Trigonometric Ratio
Dhaka Board 2025
CQ5 Creative
Stem: A ladder 10 m long leans against a wall making an angle of 60° with the ground.
উদ্দীপক: 10 মি দীর্ঘ একটি মই মাটির সাথে 60° কোণ করে দেয়ালে ঠেকানো আছে।
Chapter: Trigonometric Ratio
Dinajpur Board 2025
CQ5 Creative
Stem: A ladder 10 m long leans against a wall making an angle of 60° with the ground.
উদ্দীপক: 10 মি দীর্ঘ একটি মই মাটির সাথে 60° কোণ করে দেয়ালে ঠেকানো আছে।
Chapter: Trigonometric Ratio
Jessore Board 2025
CQ5 Creative
Stem: A ladder 10 m long leans against a wall making an angle of 60° with the ground.
উদ্দীপক: 10 মি দীর্ঘ একটি মই মাটির সাথে 60° কোণ করে দেয়ালে ঠেকানো আছে।
Chapter: Trigonometric Ratio
Mymensingh Board 2025
CQ5 Creative
Stem: A ladder 10 m long leans against a wall making an angle of 60° with the ground.
উদ্দীপক: 10 মি দীর্ঘ একটি মই মাটির সাথে 60° কোণ করে দেয়ালে ঠেকানো আছে।
Chapter: Trigonometric Ratio
Rajshahi Board 2025
CQ5 Creative
Stem: From a point on the ground, the angle of elevation of the top of a building is 30°. The building is 20 m tall.
উদ্দীপক: মাটির একটি বিন্দু থেকে একটি ভবনের চূড়ায় উন্নতি কোণ 30°। ভবনটি 20 মি উঁচু।
Chapter: Trigonometric Ratio
Sylhet Board 2025
CQ5 Creative
Stem: A ladder 10 m long leans against a wall making an angle of 60° with the ground.
উদ্দীপক: 10 মি দীর্ঘ একটি মই মাটির সাথে 60° কোণ করে দেয়ালে ঠেকানো আছে।
Chapter: Trigonometric Ratio
Barisal Board 2024
CQ6 Creative
Stem: A kite flies at 100 m height. The string makes 30° with the ground.
Chapter: Trigonometric Ratio
Chittagong Board 2024
CQ6 Creative
Stem: From a point on ground, angle of elevation to top of 50 m tower is 30°.
Chapter: Trigonometric Ratio
Comilla Board 2024
CQ6 Creative
Stem: Two buildings are 30 m apart. One is 20 m tall. Angle of elevation from top of shorter to top of taller is 30°.
Chapter: Trigonometric Ratio
Dhaka Board 2024
CQ6 Creative
Stem: From the top of a 30 m tower, the angle of depression to a ground point is 45°.
উদ্দীপক: 30 মি উঁচু মিনারের শীর্ষ থেকে মাটির একটি বিন্দুর অবনতি কোণ 45°।
Chapter: Trigonometric Ratio
Dinajpur Board 2024
CQ6 Creative
Stem: From ground, angle of elevation of top of tower is 60°. Tower is 45 m tall.
Chapter: Trigonometric Ratio
Jessore Board 2024
CQ6 Creative
Stem: Angle of elevation of top of tree from 20 m away is 45°.
Chapter: Trigonometric Ratio
Mymensingh Board 2024
CQ6 Creative
Stem: A ladder 10 m long leans against a wall. Foot makes 60° with ground.
Chapter: Trigonometric Ratio
Rajshahi Board 2024
CQ6 Creative
Stem: From top of 40 m building, angle of depression = 60°.
Chapter: Trigonometric Ratio
Sylhet Board 2024
CQ6 Creative
Stem: From a cliff 60 m high, angle of depression of a ship is 45°.
Chapter: Trigonometric Ratio
Barisal Board 2023
CQ5 Creative
Stem: A ladder 10 m long leans against a wall making an angle of 60° with the ground.
উদ্দীপক: 10 মিটার লম্বা একটি মই ভূমির সাথে 60° কোণ করে একটি দেওয়ালে হেলান দেওয়া আছে।
Chapter: Trigonometric Ratio
Chittagong Board 2023
CQ5 Creative
Stem: \(\sec\theta = \frac{5}{3}\) where \(\theta\) is an acute angle.
উদ্দীপক: \(\sec\theta = \frac{5}{3}\) যেখানে \(\theta\) সূক্ষ্মকোণ।
Chapter: Trigonometric Ratio
Comilla Board 2023
CQ5 Creative
Stem: A ladder 10 m long leans against a wall making an angle of 60° with the ground.
উদ্দীপক: 10 মিটার লম্বা একটি মই ভূমির সাথে 60° কোণ করে একটি দেওয়ালে হেলান দেওয়া আছে।
Chapter: Trigonometric Ratio
Dhaka Board 2023
CQ5 Creative
Stem: A ladder 10 m long leans against a wall making an angle of 60° with the ground.
উদ্দীপক: 10 মিটার লম্বা একটি মই ভূমির সাথে 60° কোণ করে একটি দেওয়ালে হেলান দেওয়া আছে।
Chapter: Trigonometric Ratio
Dinajpur Board 2023
CQ5 Creative
Stem: A ladder 10 m long leans against a wall making an angle of 60° with the ground.
উদ্দীপক: 10 মিটার লম্বা একটি মই ভূমির সাথে 60° কোণ করে একটি দেওয়ালে হেলান দেওয়া আছে।
Chapter: Trigonometric Ratio
Jessore Board 2023
CQ5 Creative
Stem: A ladder 10 m long leans against a wall making an angle of 60° with the ground.
উদ্দীপক: 10 মিটার লম্বা একটি মই ভূমির সাথে 60° কোণ করে একটি দেওয়ালে হেলান দেওয়া আছে।
Chapter: Trigonometric Ratio
Mymensingh Board 2023
CQ5 Creative
Stem: A ladder 10 m long leans against a wall making an angle of 60° with the ground.
উদ্দীপক: 10 মিটার লম্বা একটি মই ভূমির সাথে 60° কোণ করে একটি দেওয়ালে হেলান দেওয়া আছে।
Chapter: Trigonometric Ratio
Rajshahi Board 2023
CQ5 Creative
Stem: From a point on the ground, the angle of elevation of the top of a building is 30°. The building is 20 m tall.
উদ্দীপক: মাটির একটি বিন্দু থেকে একটি ভবনের চূড়ার উন্নতি কোণ 30°। ভবনটি 20 মিটার উঁচু।
Chapter: Trigonometric Ratio
Sylhet Board 2023
CQ5 Creative
Stem: A ladder 10 m long leans against a wall making an angle of 60° with the ground.
উদ্দীপক: 10 মিটার লম্বা একটি মই ভূমির সাথে 60° কোণ করে একটি দেওয়ালে হেলান দেওয়া আছে।
Chapter: Trigonometric Ratio
Barisal Board 2022
CQ6 Creative
Stem: From a point 20 m away from the base of a tower, the angle of elevation of the top is 60°.
উদ্দীপক: একটি মিনারের পাদদেশ থেকে 20 মি. দূরের একটি বিন্দু থেকে চূড়ার উন্নতি কোণ 60°।
Chapter: Trigonometric Ratio
Comilla Board 2022
CQ6 Creative
Stem: From a point 20 m away from the base of a tower, the angle of elevation of the top is 60°.
উদ্দীপক: একটি মিনারের পাদদেশ থেকে 20 মি. দূরের একটি বিন্দু থেকে চূড়ার উন্নতি কোণ 60°।
Chapter: Trigonometric Ratio
Dhaka Board 2022
CQ6 Creative
Stem: From a point 20 m away from the base of a tower, the angle of elevation of the top is 60°.
উদ্দীপক: একটি মিনারের পাদদেশ থেকে 20 মি. দূরের একটি বিন্দু থেকে চূড়ার উন্নতি কোণ 60°।
Chapter: Trigonometric Ratio
Dinajpur Board 2022
CQ6 Creative
Stem: From a point 20 m away from the base of a tower, the angle of elevation of the top is 60°.
উদ্দীপক: একটি মিনারের পাদদেশ থেকে 20 মি. দূরের একটি বিন্দু থেকে চূড়ার উন্নতি কোণ 60°।
Chapter: Trigonometric Ratio
Jessore Board 2022
CQ6 Creative
Stem: From a point 20 m away from the base of a tower, the angle of elevation of the top is 60°.
উদ্দীপক: একটি মিনারের পাদদেশ থেকে 20 মি. দূরের একটি বিন্দু থেকে চূড়ার উন্নতি কোণ 60°।
Chapter: Trigonometric Ratio
Mymensingh Board 2022
CQ6 Creative
Stem: From a point 20 m away from the base of a tower, the angle of elevation of the top is 60°.
উদ্দীপক: একটি মিনারের পাদদেশ থেকে 20 মি. দূরের একটি বিন্দু থেকে চূড়ার উন্নতি কোণ 60°।
Chapter: Trigonometric Ratio
Rajshahi Board 2022
CQ6 Creative
Stem: A ladder 10 m long leans against a wall making an angle of 60° with the ground.
উদ্দীপক: 10 মি. দীর্ঘ একটি মই একটি দেওয়ালে ভূমির সাথে 60° কোণে হেলান দেওয়া আছে।
Chapter: Trigonometric Ratio
Sylhet Board 2022
CQ6 Creative
Stem: From a point 20 m away from the base of a tower, the angle of elevation of the top is 60°.
উদ্দীপক: একটি মিনারের পাদদেশ থেকে 20 মি. দূরের একটি বিন্দু থেকে চূড়ার উন্নতি কোণ 60°।
Chapter: Trigonometric Ratio
Barisal Board 2021
CQ5 Creative
Stem: From the top of a 40 m building, the angle of depression to a car on the ground is 30°.
উদ্দীপক: 40 মি উঁচু ভবনের শীর্ষ থেকে মাটিতে একটি গাড়ির অবনতি কোণ 30°।
Chapter: Trigonometric Ratio
Chittagong Board 2021
CQ6 Creative
Stem: A tree casts a shadow of \(20\sqrt{3}\) m when the angle of elevation of the sun is 30°.
উদ্দীপক: সূর্যের উন্নতি কোণ 30° হলে একটি গাছের ছায়ার দৈর্ঘ্য \(20\sqrt{3}\) মি।
Chapter: Trigonometric Ratio
Comilla Board 2021
CQ5 Creative
Stem: From the top of a 40 m building, the angle of depression to a car on the ground is 30°.
উদ্দীপক: 40 মি উঁচু ভবনের শীর্ষ থেকে মাটিতে একটি গাড়ির অবনতি কোণ 30°।
Chapter: Trigonometric Ratio
Dhaka Board 2021
CQ5 Creative
Stem: From the top of a 40 m building, the angle of depression to a car on the ground is 30°.
উদ্দীপক: 40 মি উঁচু ভবনের শীর্ষ থেকে মাটিতে একটি গাড়ির অবনতি কোণ 30°।
Chapter: Trigonometric Ratio
Dinajpur Board 2021
CQ5 Creative
Stem: From the top of a 40 m building, the angle of depression to a car on the ground is 30°.
উদ্দীপক: 40 মি উঁচু ভবনের শীর্ষ থেকে মাটিতে একটি গাড়ির অবনতি কোণ 30°।
Chapter: Trigonometric Ratio
Jessore Board 2021
CQ5 Creative
Stem: From the top of a 40 m building, the angle of depression to a car on the ground is 30°.
উদ্দীপক: 40 মি উঁচু ভবনের শীর্ষ থেকে মাটিতে একটি গাড়ির অবনতি কোণ 30°।
Chapter: Trigonometric Ratio
Mymensingh Board 2021
CQ5 Creative
Stem: From the top of a 40 m building, the angle of depression to a car on the ground is 30°.
উদ্দীপক: 40 মি উঁচু ভবনের শীর্ষ থেকে মাটিতে একটি গাড়ির অবনতি কোণ 30°।
Chapter: Trigonometric Ratio
Rajshahi Board 2021
CQ5 Creative
Stem: A ladder 10 m long leans against a wall making an angle of 60° with the ground.
উদ্দীপক: 10 মি দীর্ঘ একটি মই একটি দেওয়ালে 60° কোণে ঠেসে রাখা আছে।
Chapter: Trigonometric Ratio
Sylhet Board 2021
CQ5 Creative
Stem: From the top of a 40 m building, the angle of depression to a car on the ground is 30°.
উদ্দীপক: 40 মি উঁচু ভবনের শীর্ষ থেকে মাটিতে একটি গাড়ির অবনতি কোণ 30°।
Chapter: Trigonometric Ratio
Barisal Board 2020
CQ5 Creative
Stem: From a point 50 m away from the base of a tower, the angle of elevation of the top is 60°.
উদ্দীপক: একটি মিনারের পাদদেশ থেকে 50 মি দূরের একটি বিন্দু থেকে চূড়ার উন্নতি কোণ 60°।
Chapter: Trigonometric Ratio
Chittagong Board 2020
CQ5 Creative
Stem: A 12 m ladder leans against a wall making a 60° angle with the ground.
উদ্দীপক: 12 মি লম্বা একটি মই একটি দেওয়ালে ভূমির সাথে 60° কোণে হেলান দেওয়া আছে।
Chapter: Trigonometric Ratio
Comilla Board 2020
CQ5 Creative
Stem: From a point 50 m away from the base of a tower, the angle of elevation of the top is 60°.
উদ্দীপক: একটি মিনারের পাদদেশ থেকে 50 মি দূরের একটি বিন্দু থেকে চূড়ার উন্নতি কোণ 60°।
Chapter: Trigonometric Ratio
Dhaka Board 2020
CQ5 Creative
Stem: From a point 50 m away from the base of a tower, the angle of elevation of the top is 60°.
উদ্দীপক: একটি মিনারের পাদদেশ থেকে 50 মি দূরের একটি বিন্দু থেকে চূড়ার উন্নতি কোণ 60°।
Chapter: Trigonometric Ratio
Dinajpur Board 2020
CQ5 Creative
Stem: From a point 50 m away from the base of a tower, the angle of elevation of the top is 60°.
উদ্দীপক: একটি মিনারের পাদদেশ থেকে 50 মি দূরের একটি বিন্দু থেকে চূড়ার উন্নতি কোণ 60°।
Chapter: Trigonometric Ratio
Jessore Board 2020
CQ5 Creative
Stem: From a point 50 m away from the base of a tower, the angle of elevation of the top is 60°.
উদ্দীপক: একটি মিনারের পাদদেশ থেকে 50 মি দূরের একটি বিন্দু থেকে চূড়ার উন্নতি কোণ 60°।
Chapter: Trigonometric Ratio
Mymensingh Board 2020
CQ5 Creative
Stem: From a point 50 m away from the base of a tower, the angle of elevation of the top is 60°.
উদ্দীপক: একটি মিনারের পাদদেশ থেকে 50 মি দূরের একটি বিন্দু থেকে চূড়ার উন্নতি কোণ 60°।
Chapter: Trigonometric Ratio
Rajshahi Board 2020
CQ5 Creative
Stem: A kite is flying at a height of 40 m. The string makes an angle of 30° with the ground.
উদ্দীপক: একটি ঘুড়ি 40 মি উচ্চতায় উড়ছে। সুতাটি ভূমির সাথে 30° কোণ তৈরি করে।
Chapter: Trigonometric Ratio
Sylhet Board 2020
CQ5 Creative
Stem: From a point 50 m away from the base of a tower, the angle of elevation of the top is 60°.
উদ্দীপক: একটি মিনারের পাদদেশ থেকে 50 মি দূরের একটি বিন্দু থেকে চূড়ার উন্নতি কোণ 60°।
Chapter: Trigonometric Ratio

Multiple Choice Questions (MCQ)

Barisal Board 2025
Q20 MCQ
\(\sin 30° + \cos 60° = ?\)
\(\sin 30° + \cos 60° = ?\)
ক. 0
খ. \(\frac{1}{2}\)
গ. 1
ঘ. \(\sqrt{3}\)
Barisal Board 2025
Q21 MCQ
If \(\sin\theta = \frac{5}{13}\), then \(\cos\theta = ?\) (\(\theta\) acute)
\(\sin\theta = \frac{5}{13}\) হলে \(\cos\theta = ?\) (\(\theta\) সূক্ষ্মকোণ)
ক. \(\frac{12}{13}\)
খ. \(\frac{8}{13}\)
গ. \(\frac{5}{12}\)
ঘ. \(\frac{13}{12}\)
Barisal Board 2025
Q22 MCQ
\(\sec 0° = ?\)
\(\sec 0° = ?\)
ক. 0
খ. 1
গ. Undefined
ঘ. \(\infty\)
Barisal Board 2025
Q23 MCQ
\(\tan 45° \times \cot 45° = ?\)
\(\tan 45° \times \cot 45° = ?\)
ক. 0
খ. 1
গ. 2
ঘ. Undefined
Chittagong Board 2025
Q19 MCQ
\(\cos 45° = ?\)
\(\cos 45° = ?\)
ক. \(\frac{1}{2}\)
খ. \(\frac{\sqrt{2}}{2}\)
গ. \(\frac{\sqrt{3}}{2}\)
ঘ. 1
Chittagong Board 2025
Q20 MCQ
If \(\cos\theta = \frac{4}{5}\), then \(\tan\theta = ?\) (\(\theta\) acute)
\(\cos\theta = \frac{4}{5}\) হলে \(\tan\theta = ?\) (\(\theta\) সূক্ষ্মকোণ)
ক. \(\frac{3}{4}\)
খ. \(\frac{4}{3}\)
গ. \(\frac{3}{5}\)
ঘ. \(\frac{5}{4}\)
Chittagong Board 2025
Q21 MCQ
\(\sin(90° - \theta) = ?\)
\(\sin(90° - \theta) = ?\)
ক. \(\sin\theta\)
খ. \(\cos\theta\)
গ. \(\tan\theta\)
ঘ. \(-\sin\theta\)
Chittagong Board 2025
Q22 MCQ
\(\cosec 30° = ?\)
\(\cosec 30° = ?\)
ক. 1
খ. \(\frac{2}{\sqrt{3}}\)
গ. 2
ঘ. \(\sqrt{2}\)
Comilla Board 2025
Q20 MCQ
\(\sin 30° + \cos 60° = ?\)
\(\sin 30° + \cos 60° = ?\)
ক. 0
খ. \(\frac{1}{2}\)
গ. 1
ঘ. \(\sqrt{3}\)
Comilla Board 2025
Q21 MCQ
If \(\sin\theta = \frac{5}{13}\), then \(\cos\theta = ?\) (\(\theta\) acute)
\(\sin\theta = \frac{5}{13}\) হলে \(\cos\theta = ?\) (\(\theta\) সূক্ষ্মকোণ)
ক. \(\frac{12}{13}\)
খ. \(\frac{8}{13}\)
গ. \(\frac{5}{12}\)
ঘ. \(\frac{13}{12}\)
Comilla Board 2025
Q22 MCQ
\(\sec 0° = ?\)
\(\sec 0° = ?\)
ক. 0
খ. 1
গ. Undefined
ঘ. \(\infty\)
Comilla Board 2025
Q23 MCQ
\(\tan 45° \times \cot 45° = ?\)
\(\tan 45° \times \cot 45° = ?\)
ক. 0
খ. 1
গ. 2
ঘ. Undefined
Dhaka Board 2025
Q20 MCQ
\(\sin 30° + \cos 60° = ?\)
\(\sin 30° + \cos 60° = ?\)
ক. 0
খ. \(\frac{1}{2}\)
গ. 1
ঘ. \(\sqrt{3}\)
Dhaka Board 2025
Q21 MCQ
If \(\sin\theta = \frac{5}{13}\), then \(\cos\theta = ?\) (\(\theta\) acute)
\(\sin\theta = \frac{5}{13}\) হলে \(\cos\theta = ?\) (\(\theta\) সূক্ষ্মকোণ)
ক. \(\frac{12}{13}\)
খ. \(\frac{8}{13}\)
গ. \(\frac{5}{12}\)
ঘ. \(\frac{13}{12}\)
Dhaka Board 2025
Q22 MCQ
\(\sec 0° = ?\)
\(\sec 0° = ?\)
ক. 0
খ. 1
গ. Undefined
ঘ. \(\infty\)
Dhaka Board 2025
Q23 MCQ
\(\tan 45° \times \cot 45° = ?\)
\(\tan 45° \times \cot 45° = ?\)
ক. 0
খ. 1
গ. 2
ঘ. Undefined
Dinajpur Board 2025
Q20 MCQ
\(\sin 30° + \cos 60° = ?\)
\(\sin 30° + \cos 60° = ?\)
ক. 0
খ. \(\frac{1}{2}\)
গ. 1
ঘ. \(\sqrt{3}\)
Dinajpur Board 2025
Q21 MCQ
If \(\sin\theta = \frac{5}{13}\), then \(\cos\theta = ?\) (\(\theta\) acute)
\(\sin\theta = \frac{5}{13}\) হলে \(\cos\theta = ?\) (\(\theta\) সূক্ষ্মকোণ)
ক. \(\frac{12}{13}\)
খ. \(\frac{8}{13}\)
গ. \(\frac{5}{12}\)
ঘ. \(\frac{13}{12}\)
Dinajpur Board 2025
Q22 MCQ
\(\sec 0° = ?\)
\(\sec 0° = ?\)
ক. 0
খ. 1
গ. Undefined
ঘ. \(\infty\)
Dinajpur Board 2025
Q23 MCQ
\(\tan 45° \times \cot 45° = ?\)
\(\tan 45° \times \cot 45° = ?\)
ক. 0
খ. 1
গ. 2
ঘ. Undefined
Jessore Board 2025
Q20 MCQ
\(\sin 30° + \cos 60° = ?\)
\(\sin 30° + \cos 60° = ?\)
ক. 0
খ. \(\frac{1}{2}\)
গ. 1
ঘ. \(\sqrt{3}\)
Jessore Board 2025
Q21 MCQ
If \(\sin\theta = \frac{5}{13}\), then \(\cos\theta = ?\) (\(\theta\) acute)
\(\sin\theta = \frac{5}{13}\) হলে \(\cos\theta = ?\) (\(\theta\) সূক্ষ্মকোণ)
ক. \(\frac{12}{13}\)
খ. \(\frac{8}{13}\)
গ. \(\frac{5}{12}\)
ঘ. \(\frac{13}{12}\)
Jessore Board 2025
Q22 MCQ
\(\sec 0° = ?\)
\(\sec 0° = ?\)
ক. 0
খ. 1
গ. Undefined
ঘ. \(\infty\)
Jessore Board 2025
Q23 MCQ
\(\tan 45° \times \cot 45° = ?\)
\(\tan 45° \times \cot 45° = ?\)
ক. 0
খ. 1
গ. 2
ঘ. Undefined
Mymensingh Board 2025
Q20 MCQ
\(\sin 30° + \cos 60° = ?\)
\(\sin 30° + \cos 60° = ?\)
ক. 0
খ. \(\frac{1}{2}\)
গ. 1
ঘ. \(\sqrt{3}\)
Mymensingh Board 2025
Q21 MCQ
If \(\sin\theta = \frac{5}{13}\), then \(\cos\theta = ?\) (\(\theta\) acute)
\(\sin\theta = \frac{5}{13}\) হলে \(\cos\theta = ?\) (\(\theta\) সূক্ষ্মকোণ)
ক. \(\frac{12}{13}\)
খ. \(\frac{8}{13}\)
গ. \(\frac{5}{12}\)
ঘ. \(\frac{13}{12}\)
Mymensingh Board 2025
Q22 MCQ
\(\sec 0° = ?\)
\(\sec 0° = ?\)
ক. 0
খ. 1
গ. Undefined
ঘ. \(\infty\)
Mymensingh Board 2025
Q23 MCQ
\(\tan 45° \times \cot 45° = ?\)
\(\tan 45° \times \cot 45° = ?\)
ক. 0
খ. 1
গ. 2
ঘ. Undefined
Rajshahi Board 2025
Q19 MCQ
\(\sin 0° + \cos 0° + \tan 0° = ?\)
\(\sin 0° + \cos 0° + \tan 0° = ?\)
ক. 0
খ. 1
গ. 2
ঘ. 3
Rajshahi Board 2025
Q20 MCQ
\(\sin 90° \times \cos 90° = ?\)
\(\sin 90° \times \cos 90° = ?\)
ক. 0
খ. 1
গ. \(\frac{1}{2}\)
ঘ. Undefined
Rajshahi Board 2025
Q21 MCQ
\(1 + \tan^2\theta = ?\)
\(1 + \tan^2\theta = ?\)
ক. \(\sec^2\theta\)
খ. \(\csc^2\theta\)
গ. \(\cos^2\theta\)
ঘ. \(\sin^2\theta\)
Rajshahi Board 2025
Q22 MCQ
\(\tan 60° = ?\)
\(\tan 60° = ?\)
ক. \(\frac{1}{\sqrt{3}}\)
খ. 1
গ. \(\sqrt{3}\)
ঘ. 2
Sylhet Board 2025
Q20 MCQ
\(\sin 30° + \cos 60° = ?\)
\(\sin 30° + \cos 60° = ?\)
ক. 0
খ. \(\frac{1}{2}\)
গ. 1
ঘ. \(\sqrt{3}\)
Sylhet Board 2025
Q21 MCQ
If \(\sin\theta = \frac{5}{13}\), then \(\cos\theta = ?\) (\(\theta\) acute)
\(\sin\theta = \frac{5}{13}\) হলে \(\cos\theta = ?\) (\(\theta\) সূক্ষ্মকোণ)
ক. \(\frac{12}{13}\)
খ. \(\frac{8}{13}\)
গ. \(\frac{5}{12}\)
ঘ. \(\frac{13}{12}\)
Sylhet Board 2025
Q22 MCQ
\(\sec 0° = ?\)
\(\sec 0° = ?\)
ক. 0
খ. 1
গ. Undefined
ঘ. \(\infty\)
Sylhet Board 2025
Q23 MCQ
\(\tan 45° \times \cot 45° = ?\)
\(\tan 45° \times \cot 45° = ?\)
ক. 0
খ. 1
গ. 2
ঘ. Undefined
Barisal Board 2024
Q16 MCQ
\(\sin(90°-\theta) = ?\)
ক. \(\sin\theta\)
খ. \(\cos\theta\)
গ. \(-\cos\theta\)
ঘ. \(-\sin\theta\)
Barisal Board 2024
Q17 MCQ
In a right triangle with legs 6 and 8, hypotenuse =
ক. 10
খ. 12
গ. 14
ঘ. 6
Barisal Board 2024
Q26 MCQ
\(\cos(90°-\theta) = ?\)
ক. \(\cos\theta\)
খ. \(-\cos\theta\)
গ. \(\sin\theta\)
ঘ. \(-\sin\theta\)
Chittagong Board 2024
Q14 MCQ
\(\sin 90° = ?\)
ক. 0
খ. 1/2
গ. √2/2
ঘ. 1
Chittagong Board 2024
Q15 MCQ
\(\cos 0° = ?\)
ক. 0
খ. 1/2
গ. 1
ঘ. √3/2
Chittagong Board 2024
Q21 MCQ
\(\sec 60° = ?\)
ক. 1
খ. √2
গ. 2
ঘ. √3
Chittagong Board 2024
Q29 MCQ
\(\cot\theta \cdot \tan\theta = ?\)
ক. 0
খ. 1
গ. \(\sec\theta\)
ঘ. \(\csc\theta\)
Comilla Board 2024
Q16 MCQ
\(\sin 45° = ?\)
ক. \(\frac{1}{2}\)
খ. \(\frac{\sqrt{3}}{2}\)
গ. \(\frac{1}{\sqrt{2}}\)
ঘ. 1
Comilla Board 2024
Q17 MCQ
\(1+\cot^2\theta = ?\)
ক. \(\tan^2\theta\)
খ. \(\csc^2\theta\)
গ. \(\sec^2\theta\)
ঘ. 1
Comilla Board 2024
Q21 MCQ
\(\text{cosec}\,90° = ?\)
ক. 0
খ. 1
গ. 2
ঘ. undefined
Dhaka Board 2024
Q21 MCQ
If \(\tan\theta=\frac{3}{4}\), then \(\sin\theta=\)?
\(\tan\theta=\frac{3}{4}\) হলে \(\sin\theta=\)?
ক. \(\frac{4}{5}\)
খ. \(\frac{3}{5}\)
গ. \(\frac{4}{3}\)
ঘ. \(\frac{5}{3}\)
Dhaka Board 2024
Q22 MCQ
\(\sin^2\theta + \cos^2\theta = ?\)
\(\sin^2\theta + \cos^2\theta\) এর মান:
ক. 1
খ. 0
গ. \(\sin\theta\)
ঘ. 2
Dhaka Board 2024
Q23 MCQ
\(\cos 60° = ?\)
ক. \(\frac{1}{2}\)
খ. \(\frac{\sqrt{3}}{2}\)
গ. \(\sqrt{3}\)
ঘ. 1
Dinajpur Board 2024
Q15 MCQ
\(\tan 0° = ?\)
ক. 0
খ. 1
গ. undefined
ঘ.
Dinajpur Board 2024
Q16 MCQ
If \(\sin\theta=1\), then \(\theta=?\)
ক.
খ. 45°
গ. 60°
ঘ. 90°
Dinajpur Board 2024
Q20 MCQ
\(2\sin\theta\cos\theta = ?\)
ক. \(\cos 2\theta\)
খ. \(\sin 2\theta\)
গ. \(\sin^2\theta\)
ঘ. \(\tan\theta\)
Dinajpur Board 2024
Q27 MCQ
\(1-\cos^2\theta = ?\)
ক. \(\sin\theta\)
খ. \(\sin^2\theta\)
গ. \(\tan^2\theta\)
ঘ. \(\cos^2\theta\)
Jessore Board 2024
Q14 MCQ
\(\sin^2 30°+\cos^2 30° = ?\)
ক. 1/2
খ. 3/4
গ. 1
ঘ. 2
Jessore Board 2024
Q15 MCQ
\(\tan\theta=\frac{\sin\theta}{\cos\theta}\) is:
ক. Sometimes true
খ. Always false
গ. Always true
ঘ. True only for acute angles
Jessore Board 2024
Q28 MCQ
\(1+\tan^2\theta = ?\)
ক. \(\csc^2\theta\)
খ. \(\sec^2\theta\)
গ. \(\cot^2\theta\)
ঘ. 1
Mymensingh Board 2024
Q16 MCQ
\(\text{cosec}\,30° = ?\)
ক. 1
খ. 2
গ. √2
ঘ. √3
Mymensingh Board 2024
Q17 MCQ
In right triangle, if \(\sin A=\frac{5}{13}\), then \(\cos A=?\)
ক. \(\frac{12}{13}\)
খ. \(\frac{5}{12}\)
গ. \(\frac{13}{5}\)
ঘ. \(\frac{13}{12}\)
Mymensingh Board 2024
Q21 MCQ
\(\tan 30° = ?\)
ক. \(\frac{1}{\sqrt{3}}\)
খ. \(\sqrt{3}\)
গ. \(\frac{\sqrt{3}}{2}\)
ঘ. \(\frac{1}{2}\)
Mymensingh Board 2024
Q27 MCQ
\(\text{cosec}^2\theta-\cot^2\theta = ?\)
ক. 0
খ. 1
গ. 2
ঘ. \(\csc\theta\)
Rajshahi Board 2024
Q16 MCQ
\(\sin 30° = ?\)
ক. \(\frac{\sqrt{3}}{2}\)
খ. \(\frac{1}{2}\)
গ. \(1\)
ঘ. \(\frac{1}{\sqrt{2}}\)
Rajshahi Board 2024
Q17 MCQ
\(\tan 45° = ?\)
ক. 0
খ. \(\frac{1}{\sqrt{2}}\)
গ. \(\sqrt{3}\)
ঘ. 1
Rajshahi Board 2024
Q18 MCQ
If \(\cos\theta = \frac{5}{13}\), find \(\tan\theta\).
ক. \(\frac{5}{12}\)
খ. \(\frac{12}{5}\)
গ. \(\frac{12}{13}\)
ঘ. \(\frac{13}{5}\)
Rajshahi Board 2024
Q27 MCQ
\(\sec^2\theta - \tan^2\theta = ?\)
ক. 0
খ. 1
গ. \(\sec\theta\)
ঘ. 2
Sylhet Board 2024
Q15 MCQ
\(\cos 30° = ?\)
ক. \(\frac{1}{2}\)
খ. \(\frac{\sqrt{3}}{2}\)
গ. \(\frac{1}{\sqrt{2}}\)
ঘ. \(\sqrt{3}\)
Sylhet Board 2024
Q16 MCQ
If angle of elevation = angle of depression, then:
ক. Observer above object
খ. Object above observer
গ. Same height
ঘ. Object at horizon
Sylhet Board 2024
Q20 MCQ
\(\sin 0° = ?\)
ক. 0
খ. 1
গ. −1
ঘ. undefined
Sylhet Board 2024
Q30 MCQ
\(\text{cosec}^2\theta-\cot^2\theta = ?\)
ক. 0
খ. 1
গ. 2
ঘ. \(\csc\theta\)
Barisal Board 2023
Q20 MCQ
\(\sin 30° + \cos 60° = ?\)
\(\sin 30° + \cos 60°\) এর মান কত?
ক. 0
খ. \(\frac{1}{2}\)
গ. 1
ঘ. \(\frac{\sqrt{3}}{2}\)
Barisal Board 2023
Q21 MCQ
\(\tan 45° \times \cos 45° = ?\)
\(\tan 45° \times \cos 45°\) এর মান কত?
ক. \(\frac{1}{\sqrt{2}}\)
খ. 1
গ. \(\sqrt{2}\)
ঘ. \(\frac{1}{2}\)
Barisal Board 2023
Q22 MCQ
If \(\sin\theta = \frac{4}{5}\), what is \(\cos\theta\)? (acute angle)
\(\sin\theta = \frac{4}{5}\) হলে \(\cos\theta\) = ? (সূক্ষ্মকোণ)
ক. \(\frac{3}{5}\)
খ. \(\frac{4}{3}\)
গ. \(\frac{5}{4}\)
ঘ. \(\frac{1}{5}\)
Chittagong Board 2023
Q20 MCQ
\(\tan 60° = ?\)
\(\tan 60°\) এর মান:
ক. \(\frac{1}{\sqrt{3}}\)
খ. 1
গ. \(\sqrt{3}\)
ঘ. 2
Chittagong Board 2023
Q21 MCQ
\(\sin 0° + \cos 0° = ?\)
\(\sin 0° + \cos 0°\) এর মান:
ক. 0
খ. 1
গ. 2
ঘ. undefined
Chittagong Board 2023
Q22 MCQ
\(\cot 45° = ?\)
\(\cot 45°\) এর মান:
ক. 0
খ. \(\frac{1}{2}\)
গ. 1
ঘ. \(\sqrt{2}\)
Comilla Board 2023
Q20 MCQ
\(\sin 30° + \cos 60° = ?\)
\(\sin 30° + \cos 60°\) এর মান কত?
ক. 0
খ. \(\frac{1}{2}\)
গ. 1
ঘ. \(\frac{\sqrt{3}}{2}\)
Comilla Board 2023
Q21 MCQ
\(\tan 45° \times \cos 45° = ?\)
\(\tan 45° \times \cos 45°\) এর মান কত?
ক. \(\frac{1}{\sqrt{2}}\)
খ. 1
গ. \(\sqrt{2}\)
ঘ. \(\frac{1}{2}\)
Comilla Board 2023
Q22 MCQ
If \(\sin\theta = \frac{4}{5}\), what is \(\cos\theta\)? (acute angle)
\(\sin\theta = \frac{4}{5}\) হলে \(\cos\theta\) = ? (সূক্ষ্মকোণ)
ক. \(\frac{3}{5}\)
খ. \(\frac{4}{3}\)
গ. \(\frac{5}{4}\)
ঘ. \(\frac{1}{5}\)
Dhaka Board 2023
Q20 MCQ
\(\sin 30° + \cos 60° = ?\)
\(\sin 30° + \cos 60°\) এর মান কত?
ক. 0
খ. \(\frac{1}{2}\)
গ. 1
ঘ. \(\frac{\sqrt{3}}{2}\)
Dhaka Board 2023
Q21 MCQ
\(\tan 45° \times \cos 45° = ?\)
\(\tan 45° \times \cos 45°\) এর মান কত?
ক. \(\frac{1}{\sqrt{2}}\)
খ. 1
গ. \(\sqrt{2}\)
ঘ. \(\frac{1}{2}\)
Dhaka Board 2023
Q22 MCQ
If \(\sin\theta = \frac{4}{5}\), what is \(\cos\theta\)? (acute angle)
\(\sin\theta = \frac{4}{5}\) হলে \(\cos\theta\) = ? (সূক্ষ্মকোণ)
ক. \(\frac{3}{5}\)
খ. \(\frac{4}{3}\)
গ. \(\frac{5}{4}\)
ঘ. \(\frac{1}{5}\)
Dinajpur Board 2023
Q20 MCQ
\(\sin 30° + \cos 60° = ?\)
\(\sin 30° + \cos 60°\) এর মান কত?
ক. 0
খ. \(\frac{1}{2}\)
গ. 1
ঘ. \(\frac{\sqrt{3}}{2}\)
Dinajpur Board 2023
Q21 MCQ
\(\tan 45° \times \cos 45° = ?\)
\(\tan 45° \times \cos 45°\) এর মান কত?
ক. \(\frac{1}{\sqrt{2}}\)
খ. 1
গ. \(\sqrt{2}\)
ঘ. \(\frac{1}{2}\)
Dinajpur Board 2023
Q22 MCQ
If \(\sin\theta = \frac{4}{5}\), what is \(\cos\theta\)? (acute angle)
\(\sin\theta = \frac{4}{5}\) হলে \(\cos\theta\) = ? (সূক্ষ্মকোণ)
ক. \(\frac{3}{5}\)
খ. \(\frac{4}{3}\)
গ. \(\frac{5}{4}\)
ঘ. \(\frac{1}{5}\)
Jessore Board 2023
Q20 MCQ
\(\sin 30° + \cos 60° = ?\)
\(\sin 30° + \cos 60°\) এর মান কত?
ক. 0
খ. \(\frac{1}{2}\)
গ. 1
ঘ. \(\frac{\sqrt{3}}{2}\)
Jessore Board 2023
Q21 MCQ
\(\tan 45° \times \cos 45° = ?\)
\(\tan 45° \times \cos 45°\) এর মান কত?
ক. \(\frac{1}{\sqrt{2}}\)
খ. 1
গ. \(\sqrt{2}\)
ঘ. \(\frac{1}{2}\)
Jessore Board 2023
Q22 MCQ
If \(\sin\theta = \frac{4}{5}\), what is \(\cos\theta\)? (acute angle)
\(\sin\theta = \frac{4}{5}\) হলে \(\cos\theta\) = ? (সূক্ষ্মকোণ)
ক. \(\frac{3}{5}\)
খ. \(\frac{4}{3}\)
গ. \(\frac{5}{4}\)
ঘ. \(\frac{1}{5}\)
Mymensingh Board 2023
Q20 MCQ
\(\sin 30° + \cos 60° = ?\)
\(\sin 30° + \cos 60°\) এর মান কত?
ক. 0
খ. \(\frac{1}{2}\)
গ. 1
ঘ. \(\frac{\sqrt{3}}{2}\)
Mymensingh Board 2023
Q21 MCQ
\(\tan 45° \times \cos 45° = ?\)
\(\tan 45° \times \cos 45°\) এর মান কত?
ক. \(\frac{1}{\sqrt{2}}\)
খ. 1
গ. \(\sqrt{2}\)
ঘ. \(\frac{1}{2}\)
Mymensingh Board 2023
Q22 MCQ
If \(\sin\theta = \frac{4}{5}\), what is \(\cos\theta\)? (acute angle)
\(\sin\theta = \frac{4}{5}\) হলে \(\cos\theta\) = ? (সূক্ষ্মকোণ)
ক. \(\frac{3}{5}\)
খ. \(\frac{4}{3}\)
গ. \(\frac{5}{4}\)
ঘ. \(\frac{1}{5}\)
Rajshahi Board 2023
Q20 MCQ
\(\sec 0° = ?\)
\(\sec 0°\) এর মান কত?
ক. 0
খ. 1
গ. \(\infty\)
ঘ. undefined
Rajshahi Board 2023
Q21 MCQ
If \(\cos\theta = \frac{12}{13}\), then \(\tan\theta = ?\) (acute angle)
\(\cos\theta = \frac{12}{13}\) হলে \(\tan\theta = ?\) (সূক্ষ্মকোণ)
ক. \(\frac{5}{12}\)
খ. \(\frac{5}{13}\)
গ. \(\frac{12}{5}\)
ঘ. \(\frac{13}{12}\)
Rajshahi Board 2023
Q22 MCQ
\(1 + \tan^2\theta = ?\)
\(1 + \tan^2\theta\) এর মান:
ক. \(\sin^2\theta\)
খ. \(\cos^2\theta\)
গ. \(\sec^2\theta\)
ঘ. \(\csc^2\theta\)
Sylhet Board 2023
Q20 MCQ
\(\sin 30° + \cos 60° = ?\)
\(\sin 30° + \cos 60°\) এর মান কত?
ক. 0
খ. \(\frac{1}{2}\)
গ. 1
ঘ. \(\frac{\sqrt{3}}{2}\)
Sylhet Board 2023
Q21 MCQ
\(\tan 45° \times \cos 45° = ?\)
\(\tan 45° \times \cos 45°\) এর মান কত?
ক. \(\frac{1}{\sqrt{2}}\)
খ. 1
গ. \(\sqrt{2}\)
ঘ. \(\frac{1}{2}\)
Sylhet Board 2023
Q22 MCQ
If \(\sin\theta = \frac{4}{5}\), what is \(\cos\theta\)? (acute angle)
\(\sin\theta = \frac{4}{5}\) হলে \(\cos\theta\) = ? (সূক্ষ্মকোণ)
ক. \(\frac{3}{5}\)
খ. \(\frac{4}{3}\)
গ. \(\frac{5}{4}\)
ঘ. \(\frac{1}{5}\)
Barisal Board 2022
Q18 MCQ
\(\sin 30° = ?\)
\(\sin 30°\) এর মান কত?
ক. \(\frac{1}{\sqrt{2}}\)
খ. \(\frac{1}{2}\)
গ. \(\frac{\sqrt{3}}{2}\)
ঘ. 1
Barisal Board 2022
Q19 MCQ
If \(\tan \theta = 1\) and \(0° < \theta < 90°\), then \(\theta = ?\)
\(\tan \theta = 1\) এবং \(0° < \theta < 90°\) হলে \(\theta\) = ?
ক. 30°
খ. 45°
গ. 60°
ঘ. 90°
Barisal Board 2022
Q20 MCQ
\(\sin^2 \theta + \cos^2 \theta = ?\)
\(\sin^2 \theta + \cos^2 \theta\) এর মান কত?
ক. 0
খ. 1
গ. 2
ঘ. \(\tan^2 \theta\)
Barisal Board 2022
Q30 MCQ
\(\cos 0° + \sin 90° = ?\)
\(\cos 0° + \sin 90°\) = ?
ক. 0
খ. 1
গ. 2
ঘ. \(\frac{1}{2}\)
Chittagong Board 2022
Q18 MCQ
\(\tan 60° = ?\)
\(\tan 60°\) এর মান কত?
ক. \(\frac{1}{\sqrt{3}}\)
খ. 1
গ. \(\sqrt{3}\)
ঘ. 2
Chittagong Board 2022
Q19 MCQ
\(1 + \tan^2 \theta = ?\)
\(1 + \tan^2 \theta\) = ?
ক. \(\sin^2 \theta\)
খ. \(\cos^2 \theta\)
গ. \(\sec^2 \theta\)
ঘ. \(\csc^2 \theta\)
Chittagong Board 2022
Q20 MCQ
If \(\cos \theta = \frac{12}{13}\), find \(\sin \theta\) (\(\theta\) acute).
\(\cos \theta = \frac{12}{13}\) হলে \(\sin \theta\) = ? (\(\theta\) সূক্ষ্মকোণ)
ক. \(\frac{5}{13}\)
খ. \(\frac{5}{12}\)
গ. \(\frac{12}{5}\)
ঘ. \(\frac{1}{13}\)
Chittagong Board 2022
Q30 MCQ
\(\sin 90° - \cos 90° = ?\)
\(\sin 90° - \cos 90°\) = ?
ক. 0
খ. 1
গ. 2
ঘ. -1
Comilla Board 2022
Q18 MCQ
\(\sin 30° = ?\)
\(\sin 30°\) এর মান কত?
ক. \(\frac{1}{\sqrt{2}}\)
খ. \(\frac{1}{2}\)
গ. \(\frac{\sqrt{3}}{2}\)
ঘ. 1
Comilla Board 2022
Q19 MCQ
If \(\tan \theta = 1\) and \(0° < \theta < 90°\), then \(\theta = ?\)
\(\tan \theta = 1\) এবং \(0° < \theta < 90°\) হলে \(\theta\) = ?
ক. 30°
খ. 45°
গ. 60°
ঘ. 90°
Comilla Board 2022
Q20 MCQ
\(\sin^2 \theta + \cos^2 \theta = ?\)
\(\sin^2 \theta + \cos^2 \theta\) এর মান কত?
ক. 0
খ. 1
গ. 2
ঘ. \(\tan^2 \theta\)
Comilla Board 2022
Q30 MCQ
\(\cos 0° + \sin 90° = ?\)
\(\cos 0° + \sin 90°\) = ?
ক. 0
খ. 1
গ. 2
ঘ. \(\frac{1}{2}\)
Dhaka Board 2022
Q18 MCQ
\(\sin 30° = ?\)
\(\sin 30°\) এর মান কত?
ক. \(\frac{1}{\sqrt{2}}\)
খ. \(\frac{1}{2}\)
গ. \(\frac{\sqrt{3}}{2}\)
ঘ. 1
Dhaka Board 2022
Q19 MCQ
If \(\tan \theta = 1\) and \(0° < \theta < 90°\), then \(\theta = ?\)
\(\tan \theta = 1\) এবং \(0° < \theta < 90°\) হলে \(\theta\) = ?
ক. 30°
খ. 45°
গ. 60°
ঘ. 90°
Dhaka Board 2022
Q20 MCQ
\(\sin^2 \theta + \cos^2 \theta = ?\)
\(\sin^2 \theta + \cos^2 \theta\) এর মান কত?
ক. 0
খ. 1
গ. 2
ঘ. \(\tan^2 \theta\)
Dhaka Board 2022
Q30 MCQ
\(\cos 0° + \sin 90° = ?\)
\(\cos 0° + \sin 90°\) = ?
ক. 0
খ. 1
গ. 2
ঘ. \(\frac{1}{2}\)
Dinajpur Board 2022
Q18 MCQ
\(\sin 30° = ?\)
\(\sin 30°\) এর মান কত?
ক. \(\frac{1}{\sqrt{2}}\)
খ. \(\frac{1}{2}\)
গ. \(\frac{\sqrt{3}}{2}\)
ঘ. 1
Dinajpur Board 2022
Q19 MCQ
If \(\tan \theta = 1\) and \(0° < \theta < 90°\), then \(\theta = ?\)
\(\tan \theta = 1\) এবং \(0° < \theta < 90°\) হলে \(\theta\) = ?
ক. 30°
খ. 45°
গ. 60°
ঘ. 90°
Dinajpur Board 2022
Q20 MCQ
\(\sin^2 \theta + \cos^2 \theta = ?\)
\(\sin^2 \theta + \cos^2 \theta\) এর মান কত?
ক. 0
খ. 1
গ. 2
ঘ. \(\tan^2 \theta\)
Dinajpur Board 2022
Q30 MCQ
\(\cos 0° + \sin 90° = ?\)
\(\cos 0° + \sin 90°\) = ?
ক. 0
খ. 1
গ. 2
ঘ. \(\frac{1}{2}\)
Jessore Board 2022
Q18 MCQ
\(\sin 30° = ?\)
\(\sin 30°\) এর মান কত?
ক. \(\frac{1}{\sqrt{2}}\)
খ. \(\frac{1}{2}\)
গ. \(\frac{\sqrt{3}}{2}\)
ঘ. 1
Jessore Board 2022
Q19 MCQ
If \(\tan \theta = 1\) and \(0° < \theta < 90°\), then \(\theta = ?\)
\(\tan \theta = 1\) এবং \(0° < \theta < 90°\) হলে \(\theta\) = ?
ক. 30°
খ. 45°
গ. 60°
ঘ. 90°
Jessore Board 2022
Q20 MCQ
\(\sin^2 \theta + \cos^2 \theta = ?\)
\(\sin^2 \theta + \cos^2 \theta\) এর মান কত?
ক. 0
খ. 1
গ. 2
ঘ. \(\tan^2 \theta\)
Jessore Board 2022
Q30 MCQ
\(\cos 0° + \sin 90° = ?\)
\(\cos 0° + \sin 90°\) = ?
ক. 0
খ. 1
গ. 2
ঘ. \(\frac{1}{2}\)
Mymensingh Board 2022
Q18 MCQ
\(\sin 30° = ?\)
\(\sin 30°\) এর মান কত?
ক. \(\frac{1}{\sqrt{2}}\)
খ. \(\frac{1}{2}\)
গ. \(\frac{\sqrt{3}}{2}\)
ঘ. 1
Mymensingh Board 2022
Q19 MCQ
If \(\tan \theta = 1\) and \(0° < \theta < 90°\), then \(\theta = ?\)
\(\tan \theta = 1\) এবং \(0° < \theta < 90°\) হলে \(\theta\) = ?
ক. 30°
খ. 45°
গ. 60°
ঘ. 90°
Mymensingh Board 2022
Q20 MCQ
\(\sin^2 \theta + \cos^2 \theta = ?\)
\(\sin^2 \theta + \cos^2 \theta\) এর মান কত?
ক. 0
খ. 1
গ. 2
ঘ. \(\tan^2 \theta\)
Mymensingh Board 2022
Q30 MCQ
\(\cos 0° + \sin 90° = ?\)
\(\cos 0° + \sin 90°\) = ?
ক. 0
খ. 1
গ. 2
ঘ. \(\frac{1}{2}\)
Rajshahi Board 2022
Q18 MCQ
\(\cos 60° = ?\)
\(\cos 60°\) এর মান কত?
ক. \(\frac{1}{2}\)
খ. \(\frac{\sqrt{3}}{2}\)
গ. \(\frac{1}{\sqrt{2}}\)
ঘ. 1
Rajshahi Board 2022
Q19 MCQ
\(\sec \theta = ?\)
\(\sec \theta\) = ?
ক. \(\frac{1}{\sin \theta}\)
খ. \(\frac{1}{\cos \theta}\)
গ. \(\frac{1}{\tan \theta}\)
ঘ. \(\sin \theta \cdot \cos \theta\)
Rajshahi Board 2022
Q20 MCQ
If \(\sin \theta = \frac{3}{5}\), find \(\cos \theta\) (\(\theta\) is acute).
\(\sin \theta = \frac{3}{5}\) হলে \(\cos \theta\) নির্ণয় করো (\(\theta\) সূক্ষ্মকোণ)।
ক. \(\frac{3}{5}\)
খ. \(\frac{4}{5}\)
গ. \(\frac{3}{4}\)
ঘ. \(\frac{5}{4}\)
Rajshahi Board 2022
Q30 MCQ
\(\tan 45° + \cos 0° = ?\)
\(\tan 45° + \cos 0°\) = ?
ক. 0
খ. 1
গ. 2
ঘ. 3
Sylhet Board 2022
Q18 MCQ
\(\sin 30° = ?\)
\(\sin 30°\) এর মান কত?
ক. \(\frac{1}{\sqrt{2}}\)
খ. \(\frac{1}{2}\)
গ. \(\frac{\sqrt{3}}{2}\)
ঘ. 1
Sylhet Board 2022
Q19 MCQ
If \(\tan \theta = 1\) and \(0° < \theta < 90°\), then \(\theta = ?\)
\(\tan \theta = 1\) এবং \(0° < \theta < 90°\) হলে \(\theta\) = ?
ক. 30°
খ. 45°
গ. 60°
ঘ. 90°
Sylhet Board 2022
Q20 MCQ
\(\sin^2 \theta + \cos^2 \theta = ?\)
\(\sin^2 \theta + \cos^2 \theta\) এর মান কত?
ক. 0
খ. 1
গ. 2
ঘ. \(\tan^2 \theta\)
Sylhet Board 2022
Q30 MCQ
\(\cos 0° + \sin 90° = ?\)
\(\cos 0° + \sin 90°\) = ?
ক. 0
খ. 1
গ. 2
ঘ. \(\frac{1}{2}\)
Barisal Board 2021
Q20 MCQ
\(\sin 30° + \cos 60° = ?\)
\(\sin 30° + \cos 60°\) এর মান কত?
ক. 0
খ. \(\frac{1}{2}\)
গ. 1
ঘ. \(\sqrt{3}\)
Barisal Board 2021
Q21 MCQ
\(\tan 45° \times \cos 45° = ?\)
\(\tan 45° \times \cos 45°\) এর মান:
ক. \(\frac{1}{2}\)
খ. \(\frac{1}{\sqrt{2}}\)
গ. 1
ঘ. \(\sqrt{2}\)
Barisal Board 2021
Q22 MCQ
If \(\sin\theta = \frac{4}{5}\), then \(\cos\theta = ?\) (first quadrant)
\(\sin\theta = \frac{4}{5}\) হলে \(\cos\theta = ?\) (প্রথম চতুর্ভাগে)
ক. \(\frac{3}{5}\)
খ. \(\frac{4}{5}\)
গ. \(\frac{5}{4}\)
ঘ. \(\frac{3}{4}\)
Barisal Board 2021
Q23 MCQ
\(\sec^2\theta - \tan^2\theta = ?\)
\(\sec^2\theta - \tan^2\theta\) এর মান:
ক. 0
খ. 1
গ. 2
ঘ. \(\sin^2\theta\)
Chittagong Board 2021
Q20 MCQ
\(\tan 60° = ?\)
\(\tan 60°\) এর মান:
ক. 1
খ. \(\sqrt{2}\)
গ. \(\sqrt{3}\)
ঘ. 2
Chittagong Board 2021
Q21 MCQ
\(\sin(90° - \theta) = ?\)
\(\sin(90° - \theta)\) এর মান:
ক. \(\sin\theta\)
খ. \(\cos\theta\)
গ. \(\tan\theta\)
ঘ. \(-\sin\theta\)
Chittagong Board 2021
Q22 MCQ
If \(\tan\theta = 1\), then \(\theta = ?\) (acute angle)
\(\tan\theta = 1\) হলে \(\theta = ?\) (সূক্ষ্মকোণ)
ক. 30°
খ. 45°
গ. 60°
ঘ. 90°
Chittagong Board 2021
Q23 MCQ
\(\frac{\sin 30°}{\cos 30°} = ?\)
\(\frac{\sin 30°}{\cos 30°}\) এর মান:
ক. \(\frac{1}{\sqrt{3}}\)
খ. \(\sqrt{3}\)
গ. 1
ঘ. \(\frac{\sqrt{3}}{2}\)
Comilla Board 2021
Q20 MCQ
\(\sin 30° + \cos 60° = ?\)
\(\sin 30° + \cos 60°\) এর মান কত?
ক. 0
খ. \(\frac{1}{2}\)
গ. 1
ঘ. \(\sqrt{3}\)
Comilla Board 2021
Q21 MCQ
\(\tan 45° \times \cos 45° = ?\)
\(\tan 45° \times \cos 45°\) এর মান:
ক. \(\frac{1}{2}\)
খ. \(\frac{1}{\sqrt{2}}\)
গ. 1
ঘ. \(\sqrt{2}\)
Comilla Board 2021
Q22 MCQ
If \(\sin\theta = \frac{4}{5}\), then \(\cos\theta = ?\) (first quadrant)
\(\sin\theta = \frac{4}{5}\) হলে \(\cos\theta = ?\) (প্রথম চতুর্ভাগে)
ক. \(\frac{3}{5}\)
খ. \(\frac{4}{5}\)
গ. \(\frac{5}{4}\)
ঘ. \(\frac{3}{4}\)
Comilla Board 2021
Q23 MCQ
\(\sec^2\theta - \tan^2\theta = ?\)
\(\sec^2\theta - \tan^2\theta\) এর মান:
ক. 0
খ. 1
গ. 2
ঘ. \(\sin^2\theta\)
Dhaka Board 2021
Q20 MCQ
\(\sin 30° + \cos 60° = ?\)
\(\sin 30° + \cos 60°\) এর মান কত?
ক. 0
খ. \(\frac{1}{2}\)
গ. 1
ঘ. \(\sqrt{3}\)
Dhaka Board 2021
Q21 MCQ
\(\tan 45° \times \cos 45° = ?\)
\(\tan 45° \times \cos 45°\) এর মান:
ক. \(\frac{1}{2}\)
খ. \(\frac{1}{\sqrt{2}}\)
গ. 1
ঘ. \(\sqrt{2}\)
Dhaka Board 2021
Q22 MCQ
If \(\sin\theta = \frac{4}{5}\), then \(\cos\theta = ?\) (first quadrant)
\(\sin\theta = \frac{4}{5}\) হলে \(\cos\theta = ?\) (প্রথম চতুর্ভাগে)
ক. \(\frac{3}{5}\)
খ. \(\frac{4}{5}\)
গ. \(\frac{5}{4}\)
ঘ. \(\frac{3}{4}\)
Dhaka Board 2021
Q23 MCQ
\(\sec^2\theta - \tan^2\theta = ?\)
\(\sec^2\theta - \tan^2\theta\) এর মান:
ক. 0
খ. 1
গ. 2
ঘ. \(\sin^2\theta\)
Dinajpur Board 2021
Q20 MCQ
\(\sin 30° + \cos 60° = ?\)
\(\sin 30° + \cos 60°\) এর মান কত?
ক. 0
খ. \(\frac{1}{2}\)
গ. 1
ঘ. \(\sqrt{3}\)
Dinajpur Board 2021
Q21 MCQ
\(\tan 45° \times \cos 45° = ?\)
\(\tan 45° \times \cos 45°\) এর মান:
ক. \(\frac{1}{2}\)
খ. \(\frac{1}{\sqrt{2}}\)
গ. 1
ঘ. \(\sqrt{2}\)
Dinajpur Board 2021
Q22 MCQ
If \(\sin\theta = \frac{4}{5}\), then \(\cos\theta = ?\) (first quadrant)
\(\sin\theta = \frac{4}{5}\) হলে \(\cos\theta = ?\) (প্রথম চতুর্ভাগে)
ক. \(\frac{3}{5}\)
খ. \(\frac{4}{5}\)
গ. \(\frac{5}{4}\)
ঘ. \(\frac{3}{4}\)
Dinajpur Board 2021
Q23 MCQ
\(\sec^2\theta - \tan^2\theta = ?\)
\(\sec^2\theta - \tan^2\theta\) এর মান:
ক. 0
খ. 1
গ. 2
ঘ. \(\sin^2\theta\)
Jessore Board 2021
Q20 MCQ
\(\sin 30° + \cos 60° = ?\)
\(\sin 30° + \cos 60°\) এর মান কত?
ক. 0
খ. \(\frac{1}{2}\)
গ. 1
ঘ. \(\sqrt{3}\)
Jessore Board 2021
Q21 MCQ
\(\tan 45° \times \cos 45° = ?\)
\(\tan 45° \times \cos 45°\) এর মান:
ক. \(\frac{1}{2}\)
খ. \(\frac{1}{\sqrt{2}}\)
গ. 1
ঘ. \(\sqrt{2}\)
Jessore Board 2021
Q22 MCQ
If \(\sin\theta = \frac{4}{5}\), then \(\cos\theta = ?\) (first quadrant)
\(\sin\theta = \frac{4}{5}\) হলে \(\cos\theta = ?\) (প্রথম চতুর্ভাগে)
ক. \(\frac{3}{5}\)
খ. \(\frac{4}{5}\)
গ. \(\frac{5}{4}\)
ঘ. \(\frac{3}{4}\)
Jessore Board 2021
Q23 MCQ
\(\sec^2\theta - \tan^2\theta = ?\)
\(\sec^2\theta - \tan^2\theta\) এর মান:
ক. 0
খ. 1
গ. 2
ঘ. \(\sin^2\theta\)
Mymensingh Board 2021
Q20 MCQ
\(\sin 30° + \cos 60° = ?\)
\(\sin 30° + \cos 60°\) এর মান কত?
ক. 0
খ. \(\frac{1}{2}\)
গ. 1
ঘ. \(\sqrt{3}\)
Mymensingh Board 2021
Q21 MCQ
\(\tan 45° \times \cos 45° = ?\)
\(\tan 45° \times \cos 45°\) এর মান:
ক. \(\frac{1}{2}\)
খ. \(\frac{1}{\sqrt{2}}\)
গ. 1
ঘ. \(\sqrt{2}\)
Mymensingh Board 2021
Q22 MCQ
If \(\sin\theta = \frac{4}{5}\), then \(\cos\theta = ?\) (first quadrant)
\(\sin\theta = \frac{4}{5}\) হলে \(\cos\theta = ?\) (প্রথম চতুর্ভাগে)
ক. \(\frac{3}{5}\)
খ. \(\frac{4}{5}\)
গ. \(\frac{5}{4}\)
ঘ. \(\frac{3}{4}\)
Mymensingh Board 2021
Q23 MCQ
\(\sec^2\theta - \tan^2\theta = ?\)
\(\sec^2\theta - \tan^2\theta\) এর মান:
ক. 0
খ. 1
গ. 2
ঘ. \(\sin^2\theta\)
Rajshahi Board 2021
Q20 MCQ
\(\sin 45° = ?\)
\(\sin 45°\) এর মান:
ক. \(\frac{1}{2}\)
খ. \(\frac{\sqrt{2}}{2}\)
গ. \(\frac{\sqrt{3}}{2}\)
ঘ. 1
Rajshahi Board 2021
Q21 MCQ
\(\cos 0° + \sin 90° = ?\)
\(\cos 0° + \sin 90°\) এর মান:
ক. 0
খ. 1
গ. 2
ঘ. \(\frac{1}{2}\)
Rajshahi Board 2021
Q22 MCQ
If \(\cos\theta = \frac{5}{13}\), then \(\sin\theta = ?\) (first quadrant)
\(\cos\theta = \frac{5}{13}\) হলে \(\sin\theta = ?\) (প্রথম চতুর্ভাগে)
ক. \(\frac{8}{13}\)
খ. \(\frac{12}{13}\)
গ. \(\frac{5}{12}\)
ঘ. \(\frac{13}{5}\)
Rajshahi Board 2021
Q23 MCQ
\(1 + \cot^2\theta = ?\)
\(1 + \cot^2\theta\) এর মান:
ক. \(\sec^2\theta\)
খ. \(\csc^2\theta\)
গ. \(\tan^2\theta\)
ঘ. \(\cos^2\theta\)
Sylhet Board 2021
Q20 MCQ
\(\sin 30° + \cos 60° = ?\)
\(\sin 30° + \cos 60°\) এর মান কত?
ক. 0
খ. \(\frac{1}{2}\)
গ. 1
ঘ. \(\sqrt{3}\)
Sylhet Board 2021
Q21 MCQ
\(\tan 45° \times \cos 45° = ?\)
\(\tan 45° \times \cos 45°\) এর মান:
ক. \(\frac{1}{2}\)
খ. \(\frac{1}{\sqrt{2}}\)
গ. 1
ঘ. \(\sqrt{2}\)
Sylhet Board 2021
Q22 MCQ
If \(\sin\theta = \frac{4}{5}\), then \(\cos\theta = ?\) (first quadrant)
\(\sin\theta = \frac{4}{5}\) হলে \(\cos\theta = ?\) (প্রথম চতুর্ভাগে)
ক. \(\frac{3}{5}\)
খ. \(\frac{4}{5}\)
গ. \(\frac{5}{4}\)
ঘ. \(\frac{3}{4}\)
Sylhet Board 2021
Q23 MCQ
\(\sec^2\theta - \tan^2\theta = ?\)
\(\sec^2\theta - \tan^2\theta\) এর মান:
ক. 0
খ. 1
গ. 2
ঘ. \(\sin^2\theta\)
Barisal Board 2020
Q22 MCQ
\(\sin 30° = ?\)
\(\sin 30° = ?\)
ক. \(\frac{1}{2}\)
খ. \(\frac{\sqrt{3}}{2}\)
গ. \(1\)
ঘ. \(\frac{1}{\sqrt{2}}\)
Barisal Board 2020
Q23 MCQ
\(\sec^2\theta - \tan^2\theta = ?\)
\(\sec^2\theta - \tan^2\theta = ?\)
ক. 0
খ. 1
গ. \(\sin^2\theta\)
ঘ. \(\cos^2\theta\)
Barisal Board 2020
Q24 MCQ
If \(\sin\theta = \frac{4}{5}\), then \(\cos\theta = ?\) (\(\theta\) acute)
\(\sin\theta = \frac{4}{5}\) হলে \(\cos\theta = ?\) (\(\theta\) সূক্ষ্মকোণ)
ক. \(\frac{3}{5}\)
খ. \(\frac{4}{5}\)
গ. \(\frac{5}{4}\)
ঘ. \(\frac{1}{5}\)
Chittagong Board 2020
Q22 MCQ
\(\cos 0° = ?\)
\(\cos 0° = ?\)
ক. 0
খ. \(\frac{1}{2}\)
গ. \(\frac{\sqrt{3}}{2}\)
ঘ. 1
Chittagong Board 2020
Q23 MCQ
\(1 + \tan^2\theta = ?\)
\(1 + \tan^2\theta = ?\)
ক. \(\sin^2\theta\)
খ. \(\cos^2\theta\)
গ. \(\sec^2\theta\)
ঘ. \(\csc^2\theta\)
Chittagong Board 2020
Q24 MCQ
\(\sin 60° \times \cos 30° + \cos 60° \times \sin 30° = ?\)
\(\sin 60° \times \cos 30° + \cos 60° \times \sin 30° = ?\)
ক. \(\frac{1}{2}\)
খ. \(\frac{\sqrt{3}}{2}\)
গ. 1
ঘ. \(\frac{3}{4}\)
Comilla Board 2020
Q22 MCQ
\(\sin 30° = ?\)
\(\sin 30° = ?\)
ক. \(\frac{1}{2}\)
খ. \(\frac{\sqrt{3}}{2}\)
গ. \(1\)
ঘ. \(\frac{1}{\sqrt{2}}\)
Comilla Board 2020
Q23 MCQ
\(\sec^2\theta - \tan^2\theta = ?\)
\(\sec^2\theta - \tan^2\theta = ?\)
ক. 0
খ. 1
গ. \(\sin^2\theta\)
ঘ. \(\cos^2\theta\)
Comilla Board 2020
Q24 MCQ
If \(\sin\theta = \frac{4}{5}\), then \(\cos\theta = ?\) (\(\theta\) acute)
\(\sin\theta = \frac{4}{5}\) হলে \(\cos\theta = ?\) (\(\theta\) সূক্ষ্মকোণ)
ক. \(\frac{3}{5}\)
খ. \(\frac{4}{5}\)
গ. \(\frac{5}{4}\)
ঘ. \(\frac{1}{5}\)
Dhaka Board 2020
Q22 MCQ
\(\sin 30° = ?\)
\(\sin 30° = ?\)
ক. \(\frac{1}{2}\)
খ. \(\frac{\sqrt{3}}{2}\)
গ. \(1\)
ঘ. \(\frac{1}{\sqrt{2}}\)
Dhaka Board 2020
Q23 MCQ
\(\sec^2\theta - \tan^2\theta = ?\)
\(\sec^2\theta - \tan^2\theta = ?\)
ক. 0
খ. 1
গ. \(\sin^2\theta\)
ঘ. \(\cos^2\theta\)
Dhaka Board 2020
Q24 MCQ
If \(\sin\theta = \frac{4}{5}\), then \(\cos\theta = ?\) (\(\theta\) acute)
\(\sin\theta = \frac{4}{5}\) হলে \(\cos\theta = ?\) (\(\theta\) সূক্ষ্মকোণ)
ক. \(\frac{3}{5}\)
খ. \(\frac{4}{5}\)
গ. \(\frac{5}{4}\)
ঘ. \(\frac{1}{5}\)
Dinajpur Board 2020
Q22 MCQ
\(\sin 30° = ?\)
\(\sin 30° = ?\)
ক. \(\frac{1}{2}\)
খ. \(\frac{\sqrt{3}}{2}\)
গ. \(1\)
ঘ. \(\frac{1}{\sqrt{2}}\)
Dinajpur Board 2020
Q23 MCQ
\(\sec^2\theta - \tan^2\theta = ?\)
\(\sec^2\theta - \tan^2\theta = ?\)
ক. 0
খ. 1
গ. \(\sin^2\theta\)
ঘ. \(\cos^2\theta\)
Dinajpur Board 2020
Q24 MCQ
If \(\sin\theta = \frac{4}{5}\), then \(\cos\theta = ?\) (\(\theta\) acute)
\(\sin\theta = \frac{4}{5}\) হলে \(\cos\theta = ?\) (\(\theta\) সূক্ষ্মকোণ)
ক. \(\frac{3}{5}\)
খ. \(\frac{4}{5}\)
গ. \(\frac{5}{4}\)
ঘ. \(\frac{1}{5}\)
Jessore Board 2020
Q22 MCQ
\(\sin 30° = ?\)
\(\sin 30° = ?\)
ক. \(\frac{1}{2}\)
খ. \(\frac{\sqrt{3}}{2}\)
গ. \(1\)
ঘ. \(\frac{1}{\sqrt{2}}\)
Jessore Board 2020
Q23 MCQ
\(\sec^2\theta - \tan^2\theta = ?\)
\(\sec^2\theta - \tan^2\theta = ?\)
ক. 0
খ. 1
গ. \(\sin^2\theta\)
ঘ. \(\cos^2\theta\)
Jessore Board 2020
Q24 MCQ
If \(\sin\theta = \frac{4}{5}\), then \(\cos\theta = ?\) (\(\theta\) acute)
\(\sin\theta = \frac{4}{5}\) হলে \(\cos\theta = ?\) (\(\theta\) সূক্ষ্মকোণ)
ক. \(\frac{3}{5}\)
খ. \(\frac{4}{5}\)
গ. \(\frac{5}{4}\)
ঘ. \(\frac{1}{5}\)
Mymensingh Board 2020
Q22 MCQ
\(\sin 30° = ?\)
\(\sin 30° = ?\)
ক. \(\frac{1}{2}\)
খ. \(\frac{\sqrt{3}}{2}\)
গ. \(1\)
ঘ. \(\frac{1}{\sqrt{2}}\)
Mymensingh Board 2020
Q23 MCQ
\(\sec^2\theta - \tan^2\theta = ?\)
\(\sec^2\theta - \tan^2\theta = ?\)
ক. 0
খ. 1
গ. \(\sin^2\theta\)
ঘ. \(\cos^2\theta\)
Mymensingh Board 2020
Q24 MCQ
If \(\sin\theta = \frac{4}{5}\), then \(\cos\theta = ?\) (\(\theta\) acute)
\(\sin\theta = \frac{4}{5}\) হলে \(\cos\theta = ?\) (\(\theta\) সূক্ষ্মকোণ)
ক. \(\frac{3}{5}\)
খ. \(\frac{4}{5}\)
গ. \(\frac{5}{4}\)
ঘ. \(\frac{1}{5}\)
Rajshahi Board 2020
Q22 MCQ
\(\tan 45° = ?\)
\(\tan 45° = ?\)
ক. 0
খ. \(\frac{1}{2}\)
গ. 1
ঘ. \(\sqrt{3}\)
Rajshahi Board 2020
Q23 MCQ
\(\sin(90° - \theta) = ?\)
\(\sin(90° - \theta) = ?\)
ক. \(\sin\theta\)
খ. \(\cos\theta\)
গ. \(\tan\theta\)
ঘ. \(-\sin\theta\)
Rajshahi Board 2020
Q24 MCQ
If \(\cos\theta = \frac{5}{13}\), then \(\tan\theta = ?\) (\(\theta\) acute)
\(\cos\theta = \frac{5}{13}\) হলে \(\tan\theta = ?\) (\(\theta\) সূক্ষ্মকোণ)
ক. \(\frac{12}{13}\)
খ. \(\frac{5}{12}\)
গ. \(\frac{12}{5}\)
ঘ. \(\frac{13}{12}\)
Sylhet Board 2020
Q22 MCQ
\(\sin 30° = ?\)
\(\sin 30° = ?\)
ক. \(\frac{1}{2}\)
খ. \(\frac{\sqrt{3}}{2}\)
গ. \(1\)
ঘ. \(\frac{1}{\sqrt{2}}\)
Sylhet Board 2020
Q23 MCQ
\(\sec^2\theta - \tan^2\theta = ?\)
\(\sec^2\theta - \tan^2\theta = ?\)
ক. 0
খ. 1
গ. \(\sin^2\theta\)
ঘ. \(\cos^2\theta\)
Sylhet Board 2020
Q24 MCQ
If \(\sin\theta = \frac{4}{5}\), then \(\cos\theta = ?\) (\(\theta\) acute)
\(\sin\theta = \frac{4}{5}\) হলে \(\cos\theta = ?\) (\(\theta\) সূক্ষ্মকোণ)
ক. \(\frac{3}{5}\)
খ. \(\frac{4}{5}\)
গ. \(\frac{5}{4}\)
ঘ. \(\frac{1}{5}\)