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March 4, 2015

March 4, 2015

Posted by **Grace** on Tuesday, January 17, 2012 at 11:49pm.

- Precalc -
**Steve**, Wednesday, January 18, 2012 at 5:00amrecall that

cos^{2}α + cos^{2}β + cos^{2}γ = 1

.36 + .49 + cos^{2}γ = 1

cos^{2}γ = .15

cosγ = 0.38

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