I need help with this one... sin^{3}A+cos^{3}A/sinA + CosA = 1-sinAcosA Thanks
Last edited by WhatthePatel; November 10th 2012 at 04:24 PM.
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Originally Posted by WhatthePatel I need help with this one... sin^{3}A+cos^{3}A/sinA + CosA = 1-sinAcosA Hint:
New identity? sin3x = 3cos^{2}xsinx-sin^{3}x
finish it using appropriate double angle identities. ... and, start a new thread for a new problem.
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