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OpenStudy (anonymous):
verify that trigonometry identities
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OpenStudy (anonymous):
\[\sin^3(x)-\cos^3(x)=(1+\sin(x)\cos(x))(\sin(x)-\cos(x))\]
OpenStudy (anonymous):
http://en.wikipedia.org/wiki/Factorization#Sum.2Fdifference_of_two_cubes might get you started.
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