Question

u can solve this trignometery question

Answer 1

we know

cosec²∅-cot²∅=1

therefore, cosec²∅=1+cot²∅

and 1/(1+cot²∅)=1/cosec²∅=sin²∅

now your equation solves to 2cos²∅+2sin²∅=2(cos²∅+sin²∅)=2(1)=2