Integration: TI-86 & Casio Algebra 2.0 Plus

[carey]

(03-27-2024 10:24 PM)Steve Simpkin Wrote:  The results differ from Wolfram Alpha starting at the 14th decimal place.
1.025760510931330450398548660969552 (Wolfram Alpha)
1.025760510931324876159041385002141 (Free42)

Impressive. I was always curious whether the high precision Free42 uses in calculations translates into actual precision of results since the choice of algorithms implemented in a calculator also makes a difference. However, this example shows Free 42's high precision is real.

Just to add some 15c results, in the original 2024 pi day thread, C.Ret includes a 15c program and obtained 1.02576051 with Fix 8. I'm away from my 15C CE, but using HP's 15C Iphone app set to Fix 9, the results are: 1.025760511, which agrees with Wolfram Alpha rounded to 9 decimal places.