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