February 19, 2017

Homework Help: MATH ANALYSIS

Posted by anonymous on Tuesday, May 25, 2010 at 1:02am.

How do you simplify these questions?:
1. cos^2(x/2)-sin^2(x/2)

2. 2cos^2(3A)-1

3. sin 2x/1+cos2x

I think number 3 is tan 2x?

The other two I don't know.
Thanks for the help

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