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Mathematics 8 Online
OpenStudy (anonymous):

verify that trigonometry identities

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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