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Mathematics 24 Online
OpenStudy (anonymous):

Rewrite with only sin x and cos x: Cos 3x

OpenStudy (anonymous):

a) cos x - 4 cos x sin2x b) -sin3x + 2 sin x cos x c) -sin2x + 2 sin x cos x d) 2 sin2x cos x - 2 sin x cos x

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