Trigonometry expansions

*To*: uiucuxc!yoda.ncsa.uiuc.edu!mathgroup*Subject*: Trigonometry expansions*From*: Steven Warwick <uiucuxc!hpsadsdw.hp.com!sdw>*Date*: Tue, 17 Apr 90 7:38:24 PDT

Has anyone taken the time to define trigonometric simplifications of the form: Sin[ArcSin[x]] -> x Sin[ArcTan[x/y]] -> y/Sqrt[x^2+y^2] etc. that can be added to the Algebra/trigonometry package??? -- Steven Warwick Hewlett-Packard sdw at hpsad