Решите уравнение \(\cos^4 x - \sin^4 x = \cos 6x\) . \(\frac{\pi k}{4}, k \in Z\) \(\frac{\pi k}{2}; \frac{\pi}{8} + \frac{\pi k}{4}, k \in Z\) \(\frac{\pi k}{4}; \frac{\pi}{6} + \frac{\pi k}{3}, k \in Z\) \(\frac{\pi}{6} + \frac{\pi k}{3}; \frac{\pi}{8} + \frac{\pi k}{4}, k \in Z\)

Задание

Решите уравнение \(\cos^4 x - \sin^4 x = \cos 6x\) .

\(\frac{\pi k}{4}, k \in Z\)
\(\frac{\pi k}{2}; \frac{\pi}{8} + \frac{\pi k}{4}, k \in Z\)
\(\frac{\pi k}{4}; \frac{\pi}{6} + \frac{\pi k}{3}, k \in Z\)
\(\frac{\pi}{6} + \frac{\pi k}{3}; \frac{\pi}{8} + \frac{\pi k}{4}, k \in Z\)