Question

Rewrite with only sin x and cos x.?
cos 2x - sin x

Answer 1

I got this:
By the double-angle formula for cosine:
cos(2x) - sin(x) = 1 - 2sin^2(x) - sin(x).

Answer 2

Seems like it works to me. :)

Answer 3

So in other words, it can be written as:
cos^2x - sin^2x - sin x? :O

Answer 4

Yes anything without 2x as the angle.

Answer 5

Yup, that works too. :)

Answer 6

ooh okay! thanks!