Re: trig functions

*To*: mathgroup at yoda.physics.unc.edu*Subject*: Re: trig functions*From*: bappadit at ecn.purdue.edu (Banerjee Bappaditya)*Date*: Tue, 15 Jun 1993 13:12:26 -0500 (EST)

Hi! I had recently posted an enquiry about reducing expressions to modulo 2*Pi i.e. find the angles in the appropriate quadrants. I got some very useful tips from Jerry B. Keiper (keiper at wri.com) and Daniel Lichtblau (danl at wri.com). I am posting their solutions here. For an arbitrary theta, ArcTan[Cos[theta],Sin[theta]] or Arg[Cos[theta] + I*Sin[theta]] will do the needful. I thank Jerry and Dan'l for their time and interest. bappa. Bappaditya Banerjee bappadit at mn.ecn.purdue.edu Ray W. Herrick Laboratories Purdue University West Lafayette, IN 47907 work : (317) 494 2132 (317) 494 2147 fax : (317) 494 0787 home : (317) 743 3982