Machin's Equation is 4 arctan (1/5) - arctan(1/239) = pi/4
Using Python 3.1 and the math module: >>> from math import atan, pi >>> pi 3.141592653589793 >>> (4*atan(.2) - atan(1/239))*4 3.1415926535897936 >>> (4*atan(.2) - atan(1/239))*4 == pi False >>> abs((4*atan(.2) - atan(1/239))*4) - pi < .000000000000000001 False >>> abs((4*atan(.2) - atan(1/239))*4) - pi < .0000000000000001 False >>> abs((4*atan(.2) - atan(1/239))*4) - pi < .000000000000001 True >>> Is there a way in Python 3.1 to calculate pi to greater accuracy using Machin's Equation? Even to an arbitrary number of places? Thanks, Dick Moores -- http://mail.python.org/mailman/listinfo/python-list
