February 27, 2017

Homework Help: Precalculus

Posted by Christina on Thursday, December 2, 2010 at 10:11pm.

I've tried many times to get the equation to balance using trig identities like half-angle formulas, power-reducing formulas, and double angle formulas, but I couldn't get the equation to equal out. I only need to work one side to make it equal to the other, like a kind of proof. Please help!

1 - 4sin^2(x)cos^2(x) = cos^2(2x)

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