Pi Approximation Day

[Gerson W. Barbosa]

(07-22-2019 10:49 PM)Valentin Albillo Wrote:   
...your Pi Approximation present.
 

Thank you, Valentin!

Now, let’s unwrap it:

On the HP-49G, in exact mode,

'∫(0,1,X^4*(1-X)^4/(1+X^2),X)'

EVAL

—> '-((7*π-22)/7)'

→NUM

—> 1.26448927143E-3

= 22/7 - π