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December 21, 2014

December 21, 2014

Posted by **geena** on Wednesday, May 23, 2012 at 12:17am.

- math -
**Reiny**, Wednesday, May 23, 2012 at 4:33amuse the cosine law

a^2=9^2 + 5^2 - 2(9)(5)cos 67°

= ....

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