simple identity trick: (cosx)^2 (sinx)^2 = (1/4)(sin2x)^2

[monokill]

I don't understand why:

(cosx)^2 (sinx)^2 = (1/4)(sin2x)^2

what identities are used here?

Thanks!

 

[Loren]

Re: simple identity trick

sin 2x = 2sin x cos x

Start on the right side.

And it's not a TRICK.