Вычислите интеграл от 0 до р/2 cos^2 (x) dx
Сos2x=2cos²x-1 сos²x=1/2+cos2x/2 0--π/2 ∫(1/2+1/2*cos2x)dx=x/2+1/4*sin2x F(π/2)=π/4+1/4sinπ=π/4 F(0)=0 F(π/2)-F(0)=π/4