\(2\cos x=-1\) \(\pm\frac{2\pi}{3}+2\pi n,n\in Z\) \(\frac{2\pi}{3}+2\pi n,n\in Z\) \(\pm\frac{\pi}{3}+2\pi n,n\in Z\) \(\frac{\pi}{3}+2\pi n,n\in Z\)

Задание

Решите уравнение:

\(2\cos x=-1\)

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