# SEBA Class 10 Mathematics MCQ Chapter 8 Introduction to Trigonometry

SEBA Class 10 Mathematics MCQ Chapter 8 Introduction to Trigonometry Question Answer in English Medium, Class 10 General Maths Multiple Choice Question Answer in English to each chapter is provided in the list so that you can easily browse throughout different chapters SEBA Class 10 Mathematics MCQ Chapter 8 Introduction to Trigonometry Notes and select need one.

## SEBA Class 10 Mathematics MCQ Chapter 8 Introduction to Trigonometry

Also, you can read the SCERT book online in these sections Solutions by Expert Teachers as per SCERT (CBSE) Book guidelines. These solutions are part of SCERT All Subject Solutions. Here we have given Assam SEBA Class 10 Mathematics MCQ Chapter 8 Introduction to Trigonometry Solutions for All Subject, You can practice these here.

### Introduction to Trigonometry

Chapter – 8

1. If sin = ⅗ then tan A=?

(a) 5/3

(b) 4/3

(c) ¾

(d) ⅔

Ans: (c) ¾ .

2. If x and y are complementary angles, then:

(a) tan x = tan y

(b) sin x = sin y

(c) cos x = cos y

(d) sec x = cosec y

Ans: (d) sec x = cosec y.

3. Value of sin θ cos (90° – θ) + cos θ (90° – θ) is –

(a) 0

(b) -1

(c) 3

(d) 1

Ans: (d) 1.

4. Given the equation sin⁡θ + sin⁡2θ= 1, determine the value of cos⁡2θ + cos4⁡θ:

(a) -1

(b) 1

(c) 0

(d) 2

Ans: (b) 1.

5. 8 coses2 A = 8cot2 A =?

(a) 8

(b) 9

(c) 0

(d) 1

Ans: (a) 8.

6. Ratios of sides of a right triangle with respect to its acute angles are known as:

(a) trigonometric identities.

(b) trigonometry.

(c) trigonometric ratios of the angles.

(d) none of these.

Ans: (c) trigonometric ratios of the angles.

7. Which of the following is true?

(a) The value of tan A is always less than 1.

(b) The value of cot A is always greater then 1.

(c) Sin θ = 5/3 for some angle θ.

(d) Sec θ = 12/5 for some angle θ.

Ans: (d) Sec θ = 12/5 for some angle θ.

8. The value of 9 sec2 60° – 9 tan 2 60° is:

(a) 9/2

(b) 18

(c) 3

(d) 9

Ans: (d) 9

9. What is the minimum value of sin A, 0 ≤ A ≤ 90°

(a) -1

(b) 0

(c) 1

(d) ½

Ans: (b) 0.

10. Sin 2A = 2sin A is true when A equal to:

(a) 0°

(b) 30°

(c) 18

(d) 9

Ans: (a) 0°.

11. If sin A – cos A = 0, then the value of sin4 A + cos4 A is:

(a) 2

(b) 1

(c) ¾

(d) ½

Ans: (d) ½.

12. If sin θ + sin2 θ = 1 then cos2 θ + cos4 θ equals to:

(a) – Cos A/2

(b) Sin A/2

(c) Cos A/2

(d) – Sin A/2

Ans: (b) Sin A/2.

13. What is the value of tan 45°?

(a) 0

(b) 1

(c) √2

(d) √3

Ans: (b) 1.

14. In 𝜟ABC, ∠A = 90°. IF AC = 8cm, AB = 6cm then tan B equals to:

(a) 4/3

(b) 5/4

(c) ⅗

(d) 0

Ans: (a) 4/3.

15. 2tan35° / 1 – tan230° equals to-

(a) Sin 60°

(b) Cos 60°

(c) tan 60°

(d) Sin 30°

Ans: (c) tan 60°.

16. What is the value of sec 60°?

(a) 2

(b) 1/2

(c) 2/√3

(d) 1

Ans: (c) 2/√3.

17. The value of sin 90° – θ is:

(a) sin θ

(b) cos θ

(c) tan θ

(d) cot θ

Ans: (b) cos θ.

18. 1 – cos2A is equal to:

(a) sin2A

(b) tan2A

(c) 1 – sin2A

(d) sec2A

Ans: (a) sin2A.

19. sin (90° – A) and cos A are:

(a) Different.

(b) Same.

(c) Not related.

(d) None of the above.

Ans: (b) Same.

20. 1 – tan245° / 1 + tan2 45°=

(a) tan 90°

(b) 1

(c) sin 45°

(d) 0

Ans: (d) 0.

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