1).ctg5x меньше 1 2).tg x/2 больше =кооеньиз3/3

[latex]1) \; ctg5x\ \textless \ 1\\5x \in (\frac{\pi}{4}+\pi n;\pi +\pi n)\\x\in (\frac{\pi}{20}+\frac{\pi n}{5};\frac{\pi}{5}+\frac{\pi n}{5}), \; n\in Z;\\\\ 2) \; tg \frac{x}{2} \geq \frac{\sqrt3}{3}\\\frac{x}{2} \in [\frac{\pi}{6}+\pi n; \frac{\pi}{2}+\pi n], \\x\in [\frac{\pi}{3}+2\pi n;\pi+2\pi n] \; n\in Z.[/latex]