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30 degrees
cos(sqrt3/2), sin(1/2), pie/6
45 degrees
cos(sqrt2/2), sin(sqrt2/2), pie/4
60 degrees
cos(1/2), sin(1/2), pie/3
90 degrees
(0,1), pie/2
180 degrees
(-1,0), pie
Quadrant 1
pie/6, pie/4, pie/3
Quadrant 2
2pie/3, 3pie/4, 5pie/6
Quadrant 3
7pie/6, 5pie/4, 4pie/3
Quadrant 4
5pie/3, 7pie/4, 11pie/6
30 degrees at tangent
sqrd3/3
45 degrees at tangent
1
60 degrees tangent
sqrd 3
90 degrees at tangent
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