Question

please help me in this sum​

Answer 1

Step-by-step explanation:

(1+sinθ)(1-sinθ)/(1-cosθ)(1+cosθ)

=(1-sin²θ)/(1-cos²θ)

=cos²θ/sin²θ

=cot²θ

given, tan²θ=8/7

so,(1-sinθ)(1+sinθ)/(1-cosθ)(1+cosθ)

=cot²θ=7/8