Решите уравнение cos2x=1-cos(P/2-x)
Cos 2x = 1 - Sin x 1 - 2Sin² x = 1 - Sin x Sinx - 2Sin²x = 0 Sin x(1 - 2Sin x) = 0 Sin x = 0 или 1 - 2Sin x = 0 x = πn, n∈Z Sin x = 1/2 x = (-1)^m ·π/6 + mπ, m∈Z