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Need help with trigonometry question?

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sin^2x-cos^2x / sinx+cosx = sinx-cosx.

asked Apr 7, 2016 in TRIGONOMETRY by anonymous

1 Answer

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The trigonometric idetinty is .

Consider the L.H.S

Apply difference of squares formula: .

L.H.S = R.H.S.

.

answered Apr 7, 2016 by lilly Expert

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