Решите уравнение 2cosx=√8/2

[latex]2cosx= \frac{ \sqrt{8} }{2} [/latex] [latex]2cosx= \frac{2 \sqrt{2} }{2} [/latex] [latex]2cosx= \sqrt{2} [/latex] [latex]cosx= \frac{ \sqrt{2} }{2} [/latex] x = ± [latex]arccos \frac{ \sqrt{2} }{2} +2 \pi n[/latex], n∈Z x = ± [latex] \frac{ \pi }{4}+2 \pi n, [/latex] n∈Z