Решете уравнение \(cos t = -\frac{\sqrt{2}}{2}.\)
\(t=\pm \frac{\pi}{4}+2\pi n, n\in Z.\)
\(t=- \frac{\pi}{4}+2\pi n, n\in Z.\)
\(t=\pm \frac{3\pi}{4}+2\pi n, n\in Z.\)