Преобразуй в произведение. $\cos\dfrac{\pi}{2}+\cos\dfrac{\pi}{6}$ $2\sin\dfrac{2\pi}{3}\sin\dfrac{\pi}{3}$ $2\sin\dfrac{\pi}{3}\cos\dfrac{\pi}{6}$ $2\cos\dfrac{2\pi}{3}\cos\dfrac{\pi}{3}$ $2\cos\dfrac{\pi}{3}\cos\dfrac{\pi}{6}$

Задание

Преобразуй в произведение.

\(\cos\dfrac{\pi}{2}+\cos\dfrac{\pi}{6}\)

Выбери верный вариант.

\(2\sin\dfrac{2\pi}{3}\sin\dfrac{\pi}{3}\)
\(2\sin\dfrac{\pi}{3}\cos\dfrac{\pi}{6}\)
\(2\cos\dfrac{2\pi}{3}\cos\dfrac{\pi}{3}\)
\(2\cos\dfrac{\pi}{3}\cos\dfrac{\pi}{6}\)