[WP34S] DEG and RAD  diffs

06062014, 04:07 PM
Post: #22




RE: [WP34S] DEG and RAD  diffs
(06062014 01:51 AM)Paul Dale Wrote:(06062014 01:31 AM)Claudio L. Wrote: There's other cases where this can't be avoided: cosh() for example. Yeah, I made a mistake, it was acosh() not cosh the one that gave me trouble (the rotation mode in CORDIC is quite stable, vectoring mode is much worse), since the argument close to 1 leaves you very few significant digits to work with. Also ln() is very tricky (it's also in rotation mode), because the input to the CORDIC algorithm is (1x) and (1+x). When x is close to one you lose a lot of digits in the first one, and when it's close to zero you lose them in the other one. Can't win. Claudio 

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