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January 30, 2015

January 30, 2015

Posted by **Kersten** on Saturday, December 19, 2009 at 12:38pm.

- Trigonometry -
**bobpursley**, Saturday, December 19, 2009 at 4:21pm120 degrees is a third of a circle, or 2PI/3 Where did you get 9PI/10?

The Greek letter Theta, I think, you are using.

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