под 4

Ответ от Андрей Познахарёв[гуру]
= (sin^4(pi+11pi/24) - sin^4(pi+pi/24))*sin(2pi+pi/12)*sin(4pi+pi/6) = (sin^4(11pi/24) - sin^4(pi/24))*sin(pi/12)sin(pi/6) = (sin^2(11pi/24) - sin^2(pi/24))(sin^2(11pi/24) + sin^2(pi/24))*sin(pi/12)sin(pi/6) = (sin(11pi/24) - sin(pi/24))(sin(11pi/24) + sin(pi/24))(0,5 - 0,5sin(11pi/12) + 0.5 - 0.5sin(pi/12))*sin(pi/12)sin(pi/6 = 4sin(5pi/24)cos(p/4)sin(pi/4)cos(5pi/24)(1 - 0.5(sin(11pi/12) + sin(pi/12)))*sin(pi/12)sin(pi/6) = sin(5pi/12)sin(pi/2)(1 - sin(pi/2)cos(5pi/12))*sin(pi/12)sin(pi/6) = (1 - 1 + 2sin^2(5pi/24))*sin(pi/12)sin(pi/6)sin(5pi/12) = ...