#! /usr/bin/env python3
#
def cosm_sinn ( m, n ):

  from math import pi
  from my_library import double_factorial

# backslash lets us split the following long line

  value = double_factorial ( m - 1 ) * double_factorial ( n - 1 ) \
    / double_factorial ( m + n )
  
  if ( ( m % 2 == 0 ) and ( n % 2 == 0 ) ):
    value = value * pi / 2.0

  return value

def cosm_sinn_test ( ):

# from my_library import cosm_sinn

  print ( '' )
  print ( 'm n integral value' )

  for m in range ( 2, 5 ):
    print ( '' )
    for n in range ( 2, 5 ):
      print ( m, n, cosm_sinn ( m, n ) )

  return

if ( __name__ == "__main__" ):
  cosm_sinn_test ( )