Подстановка условия
[src]7*sin(x)^2 - 5 + 7*cos(x)^2 + 2 при x = 1/2
7*sin(x)^2 - 5 + 7*cos(x)^2 + 2
7sin2(x)−5+7cos2(x)+2 7*sin((1/2))^2 - 5 + 7*cos((1/2))^2 + 2
7sin2((1/2))−5+7cos2((1/2))+2 7*sin(1/2)^2 - 5 + 7*cos(1/2)^2 + 2
−5+7sin2(21)+7cos2(21)+2 -3 + 7*cos(1/2)^2 + 7*sin(1/2)^2
−3+7sin2(21)+7cos2(21)