Tuesday
September 30, 2014

Homework Help: Precalculus

Posted by Anonymous on Saturday, November 9, 2013 at 1:29pm.

I don't understand how rationalizing the numerator of tan(1/2)x=sin x/(1+cos x) results tan(1/2)x=(1-cos x)/sin x. The question is what do you multiply by to the first equation to get the second.

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