Question

tg3x <или=-1помогите пжл срочно нужно

Answer 1

$tg3x leq -1\-frac{pi}{2}+pi n leq 3x leq arctg(-1)+pi n, nin Z\-frac{pi}{2}+pi nleq 3x leq -frac{pi}{4}+pi n, nin Z\-frac{pi}{6}+frac{pi n}{3}leq x leq -frac{pi}{12}+frac{pi n}{3}, nin Z\\xin[-frac{pi}{6}+frac{pi n}{3};-frac{pi}{12}+frac{pi n}{3}], nin Z$