Hi does anybody now how to simplify this identity. "prove (Tanx/1-tanx)+(cosx/sin-cosx)=-1
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Originally Posted by heatly Hi does anybody now how to simplify this identity. "prove (Tanx/1-tanx)+(cosx/sin-cosx)=-1 use, Spoiler:
Last edited by mr fantastic; Jun 26th 2009 at 04:44 AM.
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