sin3x-sinx=2sinxcos2x
cos2x(2sinx-sqrt(3))=0
cos2x=0 2x=П/2*(2n+1) x=П*((2n+1)/4)
sinx=sqrt(3)/2
x=П/3+2Пn
x=2/3П+2Пn
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sin3x-sinx=2sinxcos2x
cos2x(2sinx-sqrt(3))=0
cos2x=0 2x=П/2*(2n+1) x=П*((2n+1)/4)
sinx=sqrt(3)/2
x=П/3+2Пn
x=2/3П+2Пn