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Need Help With Trig Proofs?

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This is a Proof for my precaluclus class. I need help solving it.

(sin3x + cos3x)/(cosx-sinx) = 1 + 2 sin2x

trignometric-identites

asked Jul 20, 2014 in PRECALCULUS by anonymous

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1 Answer

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The trigonometric identity is (sin3x + cos3x)/(cosx-sinx) = 1 + 2 sin2x.

answered Jul 23, 2014 by casacop Expert

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