Question

Class 10 maths question paper From trigonometry​

Answer 1

1. Prove that:

2. sin 3θ= cos(θ-6°) and 3θ and θ-6° are acute angles, find value of θ. . (AI CBSE 2008)

3. If tan A=4/3, then find value of

4. If tan A=b/a, where a and b are real numbers, find value of sin2A .(AI CBSE 2007)

5. Prove that:

6. If cosθ+sin θ=√2cosθ, show that cosθ-sinθ=√2sinθ . (AI CBSE 2007)

7. Prove that Sinθ (1+tanθ)+cosθ (1+cotθ)=secθ+cosecθ . . (AI CBSE 2008)

8. Prove that: (sinθ+cosecθ)2+ (cosθ+secθ)2= 7+tan2θ+cot2θ . (AI CBSE 2008)

9. If 7 sin2θ+ cos2θ=44, show that tan=1/√3 (AI CBSE 2008)

10. If sec4A=cosec(A-20°), where 4A is a acute angle, find the value of A. (CBSE 2008)