2
Пошаговое объяснение:
4√2*sin(9Π/8)*cos(9Π/8) = 2√2*(2sin(9Π/8)*cos(9Π/8)) = 2√2*sin(9Π/4) =
= 2√2*sin(2Π+Π/4) = 2√2*sin(Π/4) = 2√2*1/√2 = 2
2
Пошаговое объяснение:
4√2*sin(9Π/8)*cos(9Π/8) = 2√2*(2sin(9Π/8)*cos(9Π/8)) = 2√2*sin(9Π/4) =
= 2√2*sin(2Π+Π/4) = 2√2*sin(Π/4) = 2√2*1/√2 = 2