17IIB TAN implementation

[Jan (Switzerland)]

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)

[W. Bruce Maguire II]

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.