HP Forum Archive 08

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17IIB TAN implementation Message #1 Posted by Jan (Switzerland) on 16 July 2002, 9:44 a.m. 17IIB – an excellent calculator for everyday work - unfortunatelly does not have trigonometry functions. It is easy to implement series expansions for SIN and COS in the HP solver. Of course TAN can be calculated from SIN/COS. It would, be more elegant to have a series expansion for TAN too, since it would allow to calculate the ARCTAN directly. The series expansion for TAN appears to be not so practical for a pocket calcs, since it requires the implementation of Bernoulli Numbers. Anybody knows a simpler way? Thanks Jan (Switzerland)

Re: 17IIB TAN implementation Message #2 Posted by W. Bruce Maguire II on 16 July 2002, 12:21 p.m., in response to message #1 by Jan (Switzerland) Jan: Please check out my last 17BII trig. post in the Articles section. If that doesn't work for you, then it will at least give you a start on your own implementation. http://www.hpmuseum.org/cgi-sys/cgiwrap/hpmuseum/articles.cgi?read=222 Bruce.

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