Question

3tan^2 (2x)$leq$1

Answer 1

$3tg^22xleq 1\\tg^22xleq frac{1}{3}\\tg^22x-frac{1}{3}leq 0; ; to ; ; ; (tg2x-frac{1}{sqrt3})(tg2x+frac{1}{sqrt3})leq 0\\-frac{1}{sqrt3}leq tg2xleq frac{1}{sqrt3}\\-frac{pi}{6}+pi nleq 2xleq frac{pi}{6}+pi n; ,; nin Z\\-frac{pi}{12}+frac{pi n}{2}leq xleq frac{pi}{12}+frac{pi n}{2}; ,; nin Z$

Answer 2

Спасибо!