Re: 35s revision? (trig bug) Message #3 Posted by Karl Schneider on 23 Apr 2008, 11:28 p.m., in response to message #1 by Rick Brown
Rick --
Bugs stemming from calculation of sine and cosine of arguments far from zero -- but where the result is very near zero -- were introduced in the HP-33s and carried forward to the HP-35s. However, the bug was not discovered and reported in time to be corrected for either model.
The following MoHPC Forum post of mine was in a thread provided in electronic form by me directly to HP's lead calculator R&D person at the 2007 HHC Conference. I would certainly expect that any future revised version of the HP-35s will include a remedy for this bug:
HP-33s & 35s trigonometric bug tabulated
It's true, though, that the bug is not very serious. Results are still correct to at least six significant digits.
-- KS
Edited: 23 Apr 2008, 11:38 p.m.
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