Perimeter of the Ellipse (HP-15C)

[Gerson W. Barbosa]

I checked the results against WolframAlpha as I did eight years ago:

https://www.hpmuseum.org/cgi-sys/cgiwrap...ead=244138

Considering the integral evaluations took about 45 seconds on the significantly faster 42S, I won’t even try it on my old 15C (perhaps I’ll try it on the 15C LE later).

The approximation program takes almost seven seconds on my old15C.

Regards,

Gerson.