0\\tgx>-\frac{\sqrt{3}}{3}\\x\in(arctg(-\frac{\sqrt{3}}{3})+\pi*n;\frac{\pi}{2}+\pi*n),\ n\in Z\\x\in(-\frac{\pi}{6}+\pi*n;\frac{\pi}{2}+\pi*n),\ n\in Z" alt="3tgx+\sqrt{3}>0\\tgx>-\frac{\sqrt{3}}{3}\\x\in(arctg(-\frac{\sqrt{3}}{3})+\pi*n;\frac{\pi}{2}+\pi*n),\ n\in Z\\x\in(-\frac{\pi}{6}+\pi*n;\frac{\pi}{2}+\pi*n),\ n\in Z" align="absmiddle" class="latex-formula">