SOLUTION: Rewrite "sin 3x" with only sin x and cos x. OPTIONS: 2 sin x cos^2x + cos x 2 sin x cos^2x + sin^3x sin x cos^2x - sin^3x + cos^3x 2 cos^2x sin x + sin x

SOLUTION: Rewrite "sin 3x" with only sin x and cos x. OPTIONS: 2 sin x cos^2x + cos x 2 sin x cos^2x + sin^3x sin x cos^2x - sin^3x + cos^3x 2 cos^2x sin x + sin x - 2 sin^3x

Question 1086857: Rewrite "sin 3x" with only sin x and cos x.

OPTIONS:
2 sin x cos^2x + cos x
2 sin x cos^2x + sin^3x
sin x cos^2x - sin^3x + cos^3x
2 cos^2x sin x + sin x - 2 sin^3x
Answer by MathLover1(20850) (Show Source): You can put this solution on YOUR website!

write
as
use the formula and expand:

..........since and , we have
......since we have

.....since we have

so,

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