Question

Prove that cos(pi+x) cos (-x)/sin(pi-x) cos (pi/2+x) =cotsquare x

Answer 1

cos(π+x)cos(-x)/sin(π-x) cos(π/2+x)=cot sqar x
-cosx cosx/sinx (-sinx). (π/2=90)
(-cos squarx) /(- sin squarx)
cotsquarx