precal
posted by ethan .
Simplify the given expression........?
(2sin2x)(cos6x)
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
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