Решите неравенство \(|\cos{x}|>\frac{\sqrt{2}}{2}.\) \((-\frac{\pi}{4}+\pi k; \frac{\pi}{4}+\pi k), k\in Z\) \((\frac{\pi}{4}+2\pi k; \frac{3\pi}{4}+2\pi k), k\in Z\) \((-\frac{\pi}{4}+\pi k; \frac{3\pi}{4}+\pi k), k\in Z\) \((-\frac{\pi}{4}+2\pi k; \frac{\pi}{4}+2\pi k), k\in Z\)

Задание

Решите неравенство \(|\cos{x}|\gt \frac{\sqrt{2}}{2}.\)

\((-\frac{\pi}{4}+\pi k; \frac{\pi}{4}+\pi k), k\in Z\)
\((\frac{\pi}{4}+2\pi k; \frac{3\pi}{4}+2\pi k), k\in Z\)
\((-\frac{\pi}{4}+\pi k; \frac{3\pi}{4}+\pi k), k\in Z\)
\((-\frac{\pi}{4}+2\pi k; \frac{\pi}{4}+2\pi k), k\in Z\)