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
- Trigonometry - Diana, Monday, January 11, 2010 at 9:37pm
You use the double angle formulas.
- Trigonometry - MathMate, Tuesday, January 12, 2010 at 7:30am
To type θ, you need to type the following without the double quotes nor the spaces: "& t h e t a ;".
As Diana suggested, use the double angle formulas. I'll do the first one as an example.
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