Решите задачу:
cosx=\frac{2}{4}=>cosx=\frac{1}{2}=> cos 60=\frac{1}{2}." alt="cosx\leq \frac{\sqrt{2}}{2} \\=>cosx=\frac{2}{4}=>cosx=\frac{1}{2}=> cos 60=\frac{1}{2}." align="absmiddle" class="latex-formula">
cosx=\frac{2}{4}=>cosx=\frac{1}{2}=> cos 60=\frac{1}{2}." alt="cosx\leq \frac{\sqrt{2}}{2} \\=>cosx=\frac{2}{4}=>cosx=\frac{1}{2}=> cos 60=\frac{1}{2}." align="absmiddle" class="latex-formula">