Question

25/2 sin^2*13 град. + 2 cos^2*373 град.

Answer 1

Знаменатель: 2(Sin² 13 + Cos²(360 + 13)) = 2(Sin²13 + Cos²13) = 2
Ответ:25/2 = 12,5

Answer 2

25/2(sin²13+cos²(360+13))=25/2(sin²13+cos²13)=25/2=12,5