Question

решите пожалуйста.25б

Answer 1

$Ctgx<-1\\arcCtg(-1)+pi n<x<pi+pi n,nin Z\\frac{3pi }{4}+pi n<x<pi+pi n,nin Z\\xin(frac{3pi }{4} +pi n,pi+pi n),nin Z$

Answer 2

$ctgx<-1\\frac{3pi }{4}+pi n<x<pi +pi n; ,; nin Z$