Подстановка условия
[src]11*sin(a)^2 - 5 + 11*cos(a)^2 при a = -1/3
11*sin(a)^2 - 5 + 11*cos(a)^2
11sin2(a)−5+11cos2(a) 11*sin((-1/3))^2 - 5 + 11*cos((-1/3))^2
11sin2((−1/3))−5+11cos2((−1/3)) 11*sin(-1/3)^2 - 5 + 11*cos(-1/3)^2
−5+11sin2(−31)+11cos2(−31) -5 + 11*cos(1/3)^2 + 11*sin(1/3)^2
−5+11sin2(31)+11cos2(31)