Задание

Решить уравнение \({\cos {x}= \frac{1}{\sqrt{2}}}\) .

\(\pm \frac{\pi}{4}+2\pi k, k\in Z\)

\(\pm \arccos {\frac{2}{\sqrt{2}}}+2\pi k, k\in Z\)

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

\(\pm \frac{5\pi}{4}+2\pi k, k\in Z\)

\(\pm \frac{\pi}{3}+2\pi k, k\in Z\)

\(\pm \frac{\pi}{6}+2\pi k, k\in Z\)

\(\pm \frac{5\pi}{6}+2\pi k, k\in Z\)