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