Задание
Таблица значений косинуса:
| \(\displaystyle \frac{\pi}{6}=30^{\circ}\) | \(\displaystyle \frac{\pi}{4}=45^{\circ}\) | \(\displaystyle \frac{\pi}{3}=60^{\circ}\) | |
| \(\displaystyle \cos\) | \(\displaystyle \frac{\sqrt{3}}{2}\) | \(\displaystyle \frac{\sqrt{2}}{2}=\frac{1}{\sqrt{2}}\) | \(\displaystyle \frac{1}{2}\) |
Решение