Решите неравенство sin x+sqrt((2)/(3))cos 2x+cos x 0.

x \in \left[-\frac{13\pi}{12}+2n\pi,\ -\frac{\pi}{4}+2n\pi\right] \cup \left[\frac{7\pi}{12}+2n\pi,\ \frac{3\pi}{4}+2n\pi\right],\ n\in\mathbb{Z}