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OpenStudy (anonymous):
prove sin theta - sin theta * COS^2 theta = sine^3 theta
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OpenStudy (neer2890):
take sin theta common sin(1-cos^2 theta) we know sin^2 theta+cos^2 theta=1 so sin^2 theta= 1- cos^2 theta putting this value in above equation sin theta* sin^2 theta= sin^3 theta
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