Cos(П/2-x)ctg(-x)/sin(П/2+x)

Question

Cos(П/2-x)ctg(-x)/sin(П/2+x)

Answer 1

Cos (П/2 - x) * ctg( - x) / Sin(П/2 + x)= (- Sinx * ctgx) / Cosx =
= - Cosx / Cosx = - 1