Question

Решите:
ctg (-x/2) = 1

Answer 1

$Ctg(-\frac{x}{2})=1\\\\-Ctg(\frac{x}{2})=1\\\\Ctg\frac{x}{2}=-1\\\\\frac{x}{2}=\frac{3\pi }{4} +\pi n,nez\\\\x=\frac{3\pi }{2}+2\pi n,nez$