Python 3.6.2 (v3.6.2:5fd33b5, Jul  8 2017, 04:14:34) [MSC v.1900 32 bit (Intel)] on win32
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>>> import math
>>> math.radians(30)
0.5235987755982988
>>> math.sin(math.radians(30))
0.49999999999999994
>>> math.cos(math.radians(60))
0.5000000000000001
>>> math.tan(math.radians(90))
1.633123935319537e+16
>>> 
