## CBSE Class 10 Maths Chapter 8 Introduction to Trigonometry Multiple Choice Questions with Answer Key

Introduction to Trigonometry MCQs – Here is a compilation of Class 10 Maths Chapter 8 Introduction to Trigonometry MCQs. Students can practice free MCQs as have been added by CBSE in the new Exam pattern to know their preparation level. At the end of Multiple Choice Questions, the answer key has also been provided for your reference.

Q1. If cos 9A = sin A and 9A < 90°, then the value of tan 5A is

(a) 0

(b) 1

(c) 1 3

(d) √3

Q2. sin 2B = 2 sin B is true when B is equal to

(a) 90°

(b) 60°

(c) 30°

(d) 0°

Q3. What is the maximum value of 1 cosec  A ?

(a) 0

(b) 1

(c) 12

(d) 2

Q4. If A and (2A – 45°) are acute angles such that sin A = cos (2A – 45°), then tan A is equal to

(a) 0

(b) 1 3

(c) 1

(d) 3

Q5. What is the minimum value of cos θ, 0 ≤ θ ≤ 90°

(a) -1

(b) 0

(c) 1

(d) 1 2

Q6. If y sin 45° cos 45° = tan² 45° – cos² 30°, then y = …

(a) –1 2

(b) 1 2

(c) -2

(d) 2

Q7. If sin A – cos A = 0, then the value of sin4 A + cos4 A is

(a) 2

(b) 1

(c) 34

(d) 1 2

Q8. If sin θ + sin² θ = 1, then cos² θ + cos4 θ = ..

(a) -1

(b) 0

(c) 1

(d) 2

Q9. 5 tan² A – 5 sec² A + 1 is equal to

(a) 6

(6) -5

(c) 1

(d) -4

Q10. If x = a cos 0 and y = b sin 0, then b²x² + a²y² =

(a) ab

(b) b² + a²

(c) a²b²

(d) a4b4

Q11. What is the minimum value of sin A, 0 ≤ A ≤ 90°

(a) -1

(b) 0

(c) 1

(d) 1 2

Q12. The value of cos 0°. cos 1°. cos 2°. cos 3°… cos 89° cos 90° is …

(a) 1

(b) -1

(c) 0

(d) 1 2

Q13. 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

Q14. If in ΔABC, ∠C = 90°, then sin (A + B) =

(a) 0

(b) 1 2

(c)1 2

(d) 1

Q15. If x tan 45° sin 30° = cos 30° tan 30°, then x is equal to

(a) 3

(b) 1 2

(c) 1 2

(d) 1

### Class 10 Maths Chapter 8 MCQ Answer Key

 Q.No. Ans. Q.No. Ans. 1 B 9 D 2 D 10 C 3 B 11 B 4 C 12 C 5 B 13 D 6 B 14 D 7 D 15 D 8 C

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