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October 23, 2014

Homework Help: Trig

Posted by Lisa on Tuesday, April 17, 2012 at 8:00am.

Can you show us how to use law of cosines to show that theta equals inverse cosine of (a^2 + b^2 -484)/(2ab) where a^2=(7+xcos a)^2 + (28-xsin a)^2 and b^2=(7+xcos a)^2 + (xsin a -6)^2? Thanks

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