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arlik [135]
3 years ago
10

Which expression is equivalent to cos(3x) sin x?

Mathematics
2 answers:
ArbitrLikvidat [17]3 years ago
7 0

Answer:

Step-by-step explanation: I tried all the other options and this was the only correct one for me on Edmentum.

LuckyWell [14K]3 years ago
4 0

Answer:

\frac{1}{2} [sin(4x)-sin(2x)]

Step-by-step explanation:

Use the Product-Sum identity to turn cos(3x) sin x into a sum.

Formula: cos(u) + sin(v) = \frac{1}{2}[sin(u+v)-sin(u-v)]

Plug 4x and 2x for u and v into the formula: \frac{1}{2}[sin(3x+x)-sin(3x-x)]

Simplify: \frac{1}{2}[sin(4x)-sin(2x)]

:)

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