Re: Avoid the use of certain functions

*To*: mathgroup at smc.vnet.net*Subject*: [mg111037] Re: Avoid the use of certain functions*From*: Murray Eisenberg <murray at math.umass.edu>*Date*: Sun, 18 Jul 2010 01:02:47 -0400 (EDT)

I don't think I understand your question, given that Sec^-1 means ArcSec. Which are you trying to avoid, ArcSec or hyperbolic functions Sech, etc.? If you're just trying to avoid hyperbolic functions, you could use TrigToExp, e.g.: TrigToExp[Sech[x]] // InputForm 2/(E^(-x) + E^x) [For purposes of text messages in this newsgroup, I used InputForm there just in order to produce a 1-dimensional output instead of an actual 2-dimensional built-up (compound) fraction.] Similary: TrigToExp[ArcSech[x]] Log[Sqrt[-1 + x^(-1)]*Sqrt[1 + x^(-1)] + x^(-1)] On 7/17/2010 8:16 AM, Sam Takoy wrote: > Hi, > > Is there a way to ask Mathematica to avoid expressing answers in terms > of certain functions. For example, I can stand Sec, Csc, Sech, and Csch > and would rather see Sec^-1, etc. > > Thanks! > -- Murray Eisenberg murray at math.umass.edu Mathematics & Statistics Dept. Lederle Graduate Research Tower phone 413 549-1020 (H) University of Massachusetts 413 545-2859 (W) 710 North Pleasant Street fax 413 545-1801 Amherst, MA 01003-9305