posted by ethan on .
Simplify the given expression........?
sin 2x and cos 6x can be expressed as a series of terms that involve sin x or cos x only, but the end result is not a simplification.
sin 2x = 2 sinx cosx
cos 6x = 32 cos^6 x -48 cos^4 x
+ 18 cos^2 x - 1
I assume you are not talking abous sin^2 x and cos^6 x
cos 6x could be written 2 cos^2 3x -1
but that doesn't help much, either