pbond54 pbond54

10-12-2020
Mathematics

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Rewrite with only sin x and cos x. (6 points) cos 2x - sin x

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12rhaeleneroberson 12rhaeleneroberson

10-12-2020

Answer:

The answer is a. cos2x - sin2x - sin x. Use the rule: cos2x = (cos^2)x - (sin^2)x. So, substitute cos2x in the expression: cos2x - sinx = ((cos^2)x - (sin^2)x) - sinx = (cos^2)x - (sin^2)x - sinx. Therefore, choice a. is correct choice.

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