Question

cos^2 41 +sin ^2 30 +sin ^2 41= ​

Answer 1

Ответ:

$\frac{5}{4}$

Пошаговое объяснение:

${\cos}^{2} (41) +{ \sin}^{2} (30) + {\sin}^{2} (41) = \\ = ({\cos}^{2} (41) + {\sin}^{2} (41)) + {\sin}^{2} (30) = \\ = 1 + {( \frac{1}{2}) }^{2} = 1 + \frac{1}{4} = \frac{5}{4}$