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Trigonometry
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OpenStudy (anonymous):
im not good with this
OpenStudy (anonymous):
sin^4 x = sin^2 x*sin^2 x = (1 - cos^2 x)(1 - cos^2 x) = =(1 - cos x)(1 + cos x)(1 - cos x)(1 + cos x)
OpenStudy (anonymous):
what
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