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Mathematics 15 Online
OpenStudy (anonymous):

How to reduce cos^3(2x)

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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