Question

cot tetha = 7/8 , then 1+sin tetha (1-sin tetha)/1+cos tetha (1-cos tetha)

Answer 1

let sin theta= s and cos theta= c
1+s × 1-s/1-c × 1+c
=1- s^2/1-c^2
= c^2/s^2
= cot^2 theta
= 49/64