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Теория: Значения синуса, косинуса, тангенса и котангенса в \(\displaystyle \frac{\pi}{6},\, \frac{\pi}{4},\, \frac{\pi}{3}\)

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