Π day

[EdS2]

(03-14-2022 06:06 PM)Gerson W. Barbosa Wrote:  Thanks you, but it’s not mine.

Oops, noted.

Quote:Actually Ramanujan’s, I think.

Yikes, what a substitution!

I don't think I have a favourite series, but I am intrigued by the many and various "Machin-like formulas" each of which must somehow be discovered.

Katie's pi program, recently mentioned here, uses one of them, by Euler I think:

Code:

4 REM Uses the formula:  pi = 20*arctan(1/7) + 8*arctan(3/79)

and I'm wondering about converting it to use another and see what difference it makes. Gauss' looks like a good one.