Can you calculate Pi using a Solver?

[jthole]

(12-09-2019 03:35 PM)Valentin Albillo Wrote:  If your Solver has Square Root and Factorial, this one from Ramanujan converges very fast and it's quite simple, few bytes to program it and only a few terms to add up for full precision...



... and no trigs used, as requested, just basic arithmetic. Once you get 1/Pi just invert it with 1/x

Regards.
V.

Very nice! Here is the equation for the 17Bii:

1 ÷ PIVAL = ( ( 2 x SQRT( 2 ) ) ÷ 9801 ) x sigma ( I : 0 : N : 1 : ( FACT( 4 x I ) x ( 1103 + 26390 x I ) ÷ ( ( FACT( I ) ^ 4 ) x ( 396 ^ ( 4 x I ) ) ) )

I only tested it on the iPhone emulator, but it goes to full precision very quickly (N=2) indeed.