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OpenStudy (anonymous):
How to reduce cos^3(2x)
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OpenStudy (jdoe0001):
doesn't look very reducible to me
OpenStudy (kira_yamato):
You may want to break it up into y(y^2) where y = cos x, then use the Pythagorean Identity. That's the way I see it... I don't know, doesn't look very reducible to me either
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