Question

$\cos(2x) + { \sin ^{2} (x) }$

Answer 1

РЕШЕНИЕ :
$\cos(2x) = \cos^{2}x - \sin^{2} x$

$\cos(2x) + \ \sin^{2} x = \cos^{2} x - \sin^{2} x + \sin^{2}x = \cos^{2}$
ОТВЕТ:
cos²x