[=(-10052 beta)/(5-cos2 beta)=RHS" Proved."],[" 4.If "sin theta+sin phi=sqrt(3)(cos phi-cos phi)," prove that "sin3 theta+],[sin3 phi=0]

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If sin theta+sin phi=sqrt(3)(cos phi-cos theta), prove that sin3 theta+sin3 phi=0

If sin theta+sin phi=sqrt(3)(cos phi-cos theta)), prove that sin3 theta+sin3 phi=0

If sin theta+ sin phi= sqrt3 (cos phi-cos theta) , prove that : sin 3 theta+ sin 3 phi=0 .

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