Question

Plz ans the que in attachment

Class X, Introduction to Trigonometry

Answer 1

1+cosθ-sin²θ/sinθ(1+cosθ)=cotθ

or 1+cosθ-sin²θ+cos²θ-cos²θ/sinθ(1+cosθ)=cotθ

or cosθ+cos²θ/sinθ(1+cosθ)=cotθ

or cosθ(1+cosθ)/sinθ(1+cosθ)=cotθ

or cosθ/sinθ=cotθ

or cotθ=cotθ

We know,cos/sin=cot

So,LHS=RHS,hence,verified