Question

Prove that the following identities : 1-sinθ/1+sinθ = (1-sinθ/cosθ)2

Answer 1

Step-by-step explanation:

1-sinθ/1+sinθ

=(1-sinθ)(1-sinθ)/(1+sinθ)(1-sinθ)

=(1-sinθ)²/cos²θ

{(1-sinθ)/cosθ}²