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January 30, 2015

January 30, 2015

Posted by **Anonymous** on Tuesday, September 17, 2013 at 11:23pm.

- Trig -
**Reiny**, Wednesday, September 18, 2013 at 12:13amWell, why not follow that hint

sin(-15) = sin(30 - 45)

= sin30cos45 - cos30sin45

= ....

You should know the trig functions of those special angles.

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