Решить уравнение \((\frac{2}{5})^{\cos x} + (\frac{5}{2})^{\cos x} = 2\) \(\frac{\pi}{2}+\pi n, n\in Z\) \(\frac{\pi}{2}+2\pi n, n\in Z\) \(\pm\frac{\pi}{2}+\pi n, n\in Z\) \(2\pi n, n\in Z\)

Задание

Решить уравнение \((\frac{2}{5})^{\cos x} + (\frac{5}{2})^{\cos x} = 2\)

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