sin5x+sinx=2sin3xcos2x
1-2sin^2x=cos2x
2sin3xcos2x-cos2x=0
cos2x(2sin3x-1)=0
cos2x=0
x=Пn/4
sin3x=1/2 x=П/18+2/3Пn x=5/18П+2/3Пn
sin5x+sinx=2sin3xcos2x
1-2sin^2x=cos2x
2sin3xcos2x-cos2x=0
cos2x(2sin3x-1)=0
cos2x=0
x=Пn/4
sin3x=1/2 x=П/18+2/3Пn x=5/18П+2/3Пn