Решите уравнение \(cos(\frac{3\pi}{2}+x)- 5cosx =0.\)

• \(arctg5 +\pi n, n \in Z\)
• \(arctc\frac{1}{5}+\pi n, n \in Z\)
• \(arctc\frac{1}{5}+2\pi n, n \in Z\)