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pishuonlain [190]
3 years ago
7

Rewrite with only sin x and cos x.

Mathematics
1 answer:
Juli2301 [7.4K]3 years ago
8 0
<span>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.</span>
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