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September 18, 2014

September 18, 2014

Posted by **Dan** on Tuesday, April 19, 2011 at 1:33pm.

- trig -
**Henry**, Thursday, April 21, 2011 at 4:52pmcos(x) = -0.6.

X = 126.87 deg.

cos(3pi/2-X) = cos(270-126.87) = -0.8

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