sinxcos2x+sin2xcosx=sin(x+2x)=sin3x
sin3x=0
3x=Пk
x=Пk/3
x1=П/3; x2=2П/3
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sinxcos2x+sin2xcosx=sin(x+2x)=sin3x
sin3x=0
3x=Пk
x=Пk/3
x1=П/3; x2=2П/3