HehCnorsshell HehCnorsshell

09-12-2016
Mathematics

contestada

Rewrite with only sin x and cos x.

cos 3x

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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Nirina7 Nirina7

09-12-2016

this may help you, check the attached file

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