# Most Important MCQ Questions for Class 10 Maths Chapter 8 Introduction to Trigonometry with Answers

Find here the Most Important NCERT chapter-wise Multiple Choice Questions from Class 10 Maths with Answers Pdf free download. this may assist you to understand and check your knowledge about the chapters Most Important MCQ. Students also can take a free test of the Multiple Choice Questions of The chapters Most Important MCQ. Each question has four options followed by the right answer. These Most Important MCQ Questions are selected supported by the newest exam pattern as announced by CBSE.

(a) 90°
(b) 60°
(c) 30°
(d) 0°

(d) 0°

(a) 120° and 60°
(b) 50° and 30°
(c) 65° and 25°
(d) 70° and 30°

(c) 65° and 25°

(a) 90°
(b) 30°
(c) 45°
(d) 60°

(c) 45°

(a) 24°
(b) 18°
(c) 27°
(d) 36°

(d) 36°

## Q5. If x and y are complementary angles, then

(a) sin x = sin y
(b) tan x = tan y
(c) cos x = cos y
(d) sec x = cosec y

(d) sec x = cosec y

(a) 2 cos ?
(b) 0
(c) 2 sin ?
(d) 1

(b) 0

(a) >1

(b) < 1
(c) =1
(d) 0

(a) >1

(a) 0
(b) 1
(c) – 1
(d) 2

(b) 1

(a) 1
(b) 0
(c) -1
(d) 2

(b) 0

(a) 0
(b) 1
(c) 2
(d) -1

(c) 2

## Q11 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

(c) trigonometric ratios of the angles

(a) 60°
(b) 20°
(c) 40°
(d) 30°

(b) 20°

(a) 2 cos ?
(b) 0
(c) 2 sin ?
(d) 1

(d) 1

(a) 6
(6) -5
(c) 1
(d) -4

(d) -4

(a) 30°
(b) 40°
(c) 60°
(d) 20°

(d) 20°

## Q16. If cos A + cos² A = 1, then sin² A + sin4 A is equal to

(a) -1
(b) 0
(c) 1
(d) None of these

(c) 1

## Q17. If sinθ  + sin² θ  = 1 then cos² θ  + cos4θ  is equal

(a) -1
(b) 1
(c) 0
(d) None of these

(b) 1

## Q18. 2(sin6θ  + cos6θ ) – 3(sin4θ  + cos4θ) is equal to

(a) 0
(b) 6
(c) -1
(d) None of these

(c) -1

(a) 0
(b) 1
(c) 2
(d) -1

(b) 1

## Q20. If x sin (90° – θ) cot (90° –θ) = cos (90° –θ), then x is equal to

(a) 0
(b) 1
(c) -1
(d) 2

(b) 1

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