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March 3, 2015

March 3, 2015

Posted by **Danielle** on Thursday, February 14, 2013 at 2:16pm.

- trig -
**Steve**, Thursday, February 14, 2013 at 4:34pmThis is just a straightforward law of cosines problem. We want to find a, given A,b,c.

A=58°, c=7.5, b=8.6

a^2 = b^2+c^2 - 2bc cosA

plug and chug. . .

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