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

x \in \left[-\frac{3\pi}{4}+2n\pi,\ \frac{\pi}{12}+2n\pi\right] \cup \left[\frac{\pi}{4}+2n\pi,\ \frac{5\pi}{12}+2n\pi\right],\ n\in\mathbb{Z}