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OpenStudy (anonymous):
Please help! Rewrite with only sin x and cos x. cos 3x ANSWER CHOICES: cos x - 4 cos x sin2x -sin3x + 2 sin x cos x -sin2x + 2 sin x cos x 2 sin2x cos x - 2 sin x cos x
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OpenStudy (mrdoe):
Use the properties of even and odd functions, and a few trig id's. Then simplify. LMK if you need another hint but if you do that i bet you'll have no trouble.
OpenStudy (anonymous):
I need another hint i dont understand this
OpenStudy (anonymous):
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