Question

cos^2 41 +sin ^2 30 +sin ^2 41= ​

Answer 1

Ответ:

$frac{5}{4}$

Пошаговое объяснение:

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