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December 11, 2016
Posted by **Maddie** on Tuesday, November 27, 2012 at 11:21pm.

- trig -
**Jennifer**, Wednesday, November 28, 2012 at 3:19pmShould this be Q IV (quadrant 4)

tan-1(-4/3) = -53.13 degrees (-53.13 degrees = 360 + -53.13 = 306.87, is in quadrant 4)

Evaluate with your calculator cos(2*306.87)