CBSE CLASS 10 MCQ TRIGONOMETRY1. If cos A = 4/5 , then the value of tan A is(A) 3/5 (B)3/4 (C)4/3 (D)5/3

2. If sin A = 1/2 , then the value of cot A is

(A) 3 (B) 1/3 (C) 3/2 (D) 1

3. The value of the expression [cosec (75 + q) sec (15 q tan (55 + q+ cot (35 q)] is

(A) 1 (B) 0 (C) 1 (D) 3/2

4. Given that sinq= a/b , then cosq is equal to5. If cos (a + b) = 0, then sin (a - b) can be reduced to(A) cos b (B) cos 2b (C) sin α (D) sin 2a

6. The value of (tan1 tan 2 tan3 ... tan 89) is

(A) 0 (B) 1 (C) 2 (D)1 / 2

7. If cos 9a= sinα and 9a a is

(A) 1/√3 (B) √ 3 (C) 1 (D) 0

8. If DABC is right angled at C, then the value of cos (A+B) is

(A) 0 (B) 1 (C) 1/2 (D)√3/2

9. If sinA + sin²A = 1, then the value of the expression (cos²A + cos⁴A) is

(A) 1 (B) 1/2 (C) 2 (D) 3

10. Given that sina= 1/2 and cosb =1/2 , then the value of (a + b) is

(A) 0 (B) 30 (C) 60 (D) 90

11. The value of the expression [sin²22⁰sin²68⁰/ cos²22⁰cos²68⁰+ sin²63⁰cos63⁰sin 27⁰] is (A) 3 (B) 2 (C) 1 (D) 0

12. If 4 tanq = 3, then [4sinq - cosq ] / [4sinq + cos q ] is equal to

(A) 2/3 (B) 1/3 (C) 1/2 (D) 3/4

13. If sinq cosq = 0, then the value of (sin⁴q + cos⁴qθ) is

(A) 1 (B) 3/4 (C) 1/2 (D) 1/4

14. sin (45 + q) cos (45 q) is equal to

(A) 2cosq (B) 0 (C) 2 sin q (D) 1

15. A pole 6 m high casts a shadow 2 √3m long on theground, then the Suns elevation is

(A ) 60 (B) 45 (C) 30 (D) 90