Chris Jones wrote: ...
I'm well aware of these series, and already use them when appropriate. In this case, I need tan(x) with fixed errors, between 0 and 2pi, the whole range.
Can you use a lookup table? Mogens -- Mogens Kjaer, Carlsberg A/S, Computer Department Gamle Carlsberg Vej 10, DK-2500 Valby, Denmark Phone: +45 33 27 53 25, Fax: +45 33 27 47 08 Email: mk@xxxxxx Homepage: http://www.crc.dk