Question

Вычисли sin2(5,5π + α) – cos2(5π – α) + 1
СРОЧНО!!!

Answer 1

Ответ:

$\sin {}^{2} ( 5.5\pi + \alpha ) - \cos {}^{2} (5\pi - \alpha ) + 1 = \\ = \cos {}^{2} ( \alpha ) - \cos {}^{2} ( \alpha ) + 1 = 1$