Posted by damion on Wednesday, January 25, 2012 at 11:49pm.
30 60 90 triangle is 1, sqrt 3 , 2
cos 60 = 1/2
sin 60 = sqrt 3 /2
tan 60 degrees = sqrt 3 / 1
so 60 degrees
tan is also + in quadrant 3
so
60 + 180 = 240 degrees
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