Question

if cotΦ=7/8 evaluate (1+sinΦ)(1-sinΦ)/(1+cosΦ)(1-cosΦ)​

Answer 1

According to Pythagoras

Ac² = Ab² + Bc²

Ac² = 7² + 8²

= 49+64

= 113

Ac = √113

= 10.6

Now

if 1+sin theeta = 1+ 8/10.6

= 1.7