Sinx + Sin3x = Sin2x +Sin4x
2Sin2xCosx = 2Sin3xCosx
Sin2xCosx - Sin3xCosx = 0
Cosx(Sin2x -Sin3x) = 0
Cosx = 0 или Sin2x -Sin3x = 0
x = π/2 + πk , k ∈Z 2Sin0,5xCos2,5x = 0
Sin0,5x = 0 или Cos2,5x = 0
0,5x = nπ, n ∈Z 2,5x = π/2 + πm
x = 2nπ, n ∈Z x = π/5 +2πm/5, m∈Z