sin2x=3sinxcosx
2sinxcosx-3sinxcosx=0
-sinxcosx=0
sinx=o
x=Пn
cosx=0
x=П/2+Пn
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sin2x=3sinxcosx
2sinxcosx-3sinxcosx=0
-sinxcosx=0
sinx=o
x=Пn
cosx=0
x=П/2+Пn