4 years ago

Rewrite with only sin x and cos x. cos 3x

Mathematics

1 answer:

Feliz [49]4 years ago

4 0

Answer:

cos(3x) --> cos³(x) - 3sin²(x)cos(x)

Step-by-step explanation:

The text in pink are the trig identities I used to convert cos(2x) and sin(2x) into their other equivalent forms.

This question is pretty much asking if you know how to use your trig identities if i understand it correctly.

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