February 22, 2017

Homework Help: Trigonometry

Posted by Bailey on Monday, January 11, 2010 at 9:12pm.

I can't remember what formula to use for these.

Note- the X's may be replaced by a theta symbol. I just didn't have one on my keyboard.
Use the given information to find sin2X, cos2X and tan2X if 0< X <pi/2

1. sinX=12/13

2. cosX=3/5

3. tanX=2/3

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