Решите тригонометрическое уравнение: \(ctgx=-1\)
\(x=\frac{3\pi}{4}+\pi n, n\in Z\)
\(x=\frac{\pi}{4}+\pi n, n\in Z\)
\(x=-\frac{3\pi}{4}+\pi n, n\in Z\)
\(x=-\frac{3\pi}{4}+2\pi n, n\in Z\)