[Numpy-discussion] cos -- NameError: global name 'cos' is not defined

Wayne Watson sierra_mtnview@sbcglobal....
Mon Dec 21 11:40:36 CST 2009

In this code,
import math
import numpy as np
from numpy import matrix
def sinD(D): # given in degrees, convert to radians
    return sin(radians(D))
def cosD(D):
    return cos(radians(D))   <<--------------
def acosD(D):
the << line produces, "NameError: global name 'cos' is not defined", but 
the sin() above it does not? They are both built-in functions.

           Wayne Watson (Watson Adventures, Prop., Nevada City, CA)

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