Question

ctg x < -(1/корень 3)

Answer 1

$ctgx<-\frac{1}{\sqrt3}\; \; ,\; \; ctgx<-\frac{\sqrt3}{3}\qquad \Big (ctg\frac{2\pi }{3}=-\frac{\sqrt3}{3} \; \Big )\\\\\frac{2\pi }{3}+\pi n<x<\pi +\pi n\; ,\; \; n\in Z$