cotθ√(1-cos2θ) = কত?

cotθ√(1-cos²θ) = কত?

A sinθ

B cosθ

C tanθ

D cotθ

Solution

Correct Answer: Option B

cotθ√(1-cos²θ)
=cotθ√(sin²θ) [যেহেতু, sin²θ=1-cos²θ]
=(cosθ/sinθ).sinθ
= cosθ