#!/usr/bin/env python
     # encoding: utf-8
     #
     # Copyright (c) 2010 Doug Hellmann.  All rights reserved.
     #
     """Inverse trigonometric functions
     """
     #end_pymotw_header
     
     import math
     
     for r in [ 0, 0.5, 1 ]:
         print 'arcsine(%.1f)    = %5.2f' % (r, math.asin(r))
         print 'arccosine(%.1f)  = %5.2f' % (r, math.acos(r))
         print 'arctangent(%.1f) = %5.2f' % (r, math.atan(r))
         print