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OpenStudy (anonymous):
how to verify sin^4x-cos^4x/sinx-cosx = sinx + cosx
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terenzreignz (terenzreignz):
Magic :D \[\Large \sin^4(x) - \cos^4(x) = \left[\sin^2(x) + \cos^2(x)\right] \left[\sin^2(x) -\cos^2(x)\right]\]
OpenStudy (anonymous):
i love magic! @terenzreignz
terenzreignz (terenzreignz):
Who doesn't? :3 The asker, that's who :D
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