I read of the accuracy test performed using 9 sin cos tan arc tan arc cos arc sin in sequence. In the 50g in the degrees mode it shows 8.999999864267. I wondered how it would perform in the radians mode so I used Pi/20 (same 9 degrees) repeated the test and divided the results into the original angle and multiplied by 9 to get a comparable number (9). It showed 8.999999999995
It seems the algorithms are more compatible with the radian mode. Sam
Calculator forensics


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06052008, 08:27 PM
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06062008, 01:25 AM
Quote: Hi, Sam  Have a look here (discussion from me): http://www.hpmuseum.org/cgisys/cgiwrap/hpmuseum/archv017.cgi?read=113143#113143 And here (discussion from Valentin): http://www.hpmuseum.org/cgisys/cgiwrap/hpmuseum/archv014.cgi?read=69026 In fairness, the author of the forensic did not intend it to be a measure of a calculator's general accuracy; he intended it to be an indicator of internal algorithms and precision for purposes of comparison between models.  KS 
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