Question

Write the expression as the sine, cosine, or tangent of an angle.

cos 8x cos 2x - sin 8x sin 2x

so would this be sin10?

Answer 1

@satellite73

Answer 2

?

Answer 3

Use cosine addition formula

Answer 4

sin(10)? Where did the x go? You can;t just throw stuff out when you don't like it.

Listen to Xavier \(\cos(\alpha + \beta) = ??\)

Answer 5

lol my bad I meant to put the x

Answer 6

so the answer is cos10x

Answer 7

That's better.

Answer 8

Thank you lol :)