Sin 2X меньше \frac{1}{2} Спасибо

[latex]sin2x\ \textless \ \frac{1}{2} \\\\-\frac{7\pi}{6}+2\pi n\ \textless \ 2x\ \textless \ \frac{\pi}{6}+2\pi n\; \; ,\; \; n\in Z\\\\-\frac{7\pi}{12}+\pi n\ \textless \ x\ \textless \ \frac{\pi}{12}+\pi n\; \; ,\; n\in Z[/latex]