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Mathematics 8 Online
OpenStudy (anonymous):

Prove: cosx-sinx/ cosx + sinx = (cosx-sinx)^2/1-2sin ^2x

OpenStudy (anonymous):

I did cos-2(sinx cosx)+sin^2x/cos^2x-sin^2x

OpenStudy (anonymous):

so, dont sin^2x cross out?

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