
Re: A single term formula for calculating the circumference of ellipse
Posted:
Jan 6, 2013 3:17 AM


This enables an extra significant digit at the worse part of the approximation of Zafary's discovery:
E(1x^2)~(1+x)*(pi/4)^(1(1+36x37x^2)^2/(1+38x+36x^2)^2)
I like to put the circumference of ellipse into terms of E.
C~4a(1+b)(pi/4)^(1(1+36b37b^2)^2/(1+38b+36b^2)^2)
Letting b=b/a.
I figure these numbers would be simple to remember.
Thomas Blankenhorn

