Re: Simlifying Sqrt[x^2] type args.

*To*: mathgroup at smc.vnet.net*Subject*: [mg24622] Re: Simlifying Sqrt[x^2] type args.*From*: "Allan Hayes" <hay at haystack.demon.co.uk>*Date*: Fri, 28 Jul 2000 17:24:00 -0400 (EDT)*References*: <8lgsmk$2d0@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

Jaime, PowerExpand[Sqrt[k^2 r^2 Sin[theta]^2] ] k r Sin[theta] But please note that this is not always valid: Sqrt[4.0^2 4.0^2 Sin[4.0]^2] 12.1088 4.0 4.0 Sin[4.0] -12.1088 -- Allan --------------------- Allan Hayes Mathematica Training and Consulting Leicester UK www.haystack.demon.co.uk hay at haystack.demon.co.uk Voice: +44 (0)116 271 4198 Fax: +44 (0)870 164 0565 "Jaime Morales" <jaimem at primenet.com> wrote in message news:8lgsmk$2d0 at smc.vnet.net... > Hello, > > I am curious if there is a way to do symbolics in mathematica > where objects like > > Sqrt[k^2 r^2 Sin[theta]^2] > > are set to > > k r Sin[theta] > > .. > > I am doing a long calculation and objects as the above > occur in many places, usualy as arguments to BesselJ > functions, and it would be nice to have mathematica > resolve these for me, it would even be nicer if it could > be done globaly for all calculations withing the notbook. > > thanks, > > -Jaime > jaime at rsm1.physics.uiuc.edu > > > -- > >