I have started a new chapter and I am having problems solving #6. I'm not even sure what I should do to start. Any help would be greatly appreciated.

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- Dec 30th 2009, 08:02 AMwhiteforlifeMultiple Angle Formula Help
I have started a new chapter and I am having problems solving #6. I'm not even sure what I should do to start. Any help would be greatly appreciated.

http://i49.tinypic.com/2n9kiz9.png - Dec 30th 2009, 08:12 AMVonNemo19
Start with number ione, and then work your way to the end. :)

Recall that $\displaystyle \sin\theta=\frac{opposite}{hypotenuse}$

Well, you have the opposite, but not the hypotenuse. To find the hypotenuse, use the pythagorean theorem.

After you have computed sin, cos, and tan... You can make use of double angle Identities to find the values of the others. - Dec 30th 2009, 08:22 AMwhiteforlife
- Dec 30th 2009, 08:25 AMVonNemo19
Check this out

Double-Angle and Half-Angle Formulas - Dec 30th 2009, 08:26 AMskeeter
- Dec 30th 2009, 09:07 AMwhiteforlife
Thanks guys that helped alot, I have it all figured out now.