ACURACY

[Dieter]

(06-22-2016 05:51 PM)dalupus Wrote:  HP35S 8.99999986001
HPPrime 8.99999864267 In rpn mode
HPPrime 9 in CAS mode

Did we actually find a case where the 35s is actually more accurate at a trig function?

No, we didn't. The correct result for a 12-digit calculator is 8,99999864267.

The 35s rounds down the arctan although it should round up: the exact value is 0,999996272743 534... which is rounded to ...43 on the 35s and to ...44 on other calculators. Once this is adjusted the 35s yields the same correct result as the Saturn calculators. On the other hand this is a close case, and the trig functions may have an error of 0,6 ULP, so this still is within the allowed tolerance.

Dieter