Re: implizit function
- To: mathgroup at smc.vnet.net
- Subject: [mg5962] Re: [mg5920] implizit function
- From: seanross at worldnet.att.net
- Date: Wed, 5 Feb 1997 21:11:59 -0500
- Sender: owner-wri-mathgroup at wolfram.com
Vital M. Meyer wrote: > > hi, > > i would like to find the (numerical) solutions of > > y*tan(y)=x > > with mathematica. i don't see how to get it. > does anybody konw? > > thanks Vital > -- > ********************************************************************* > Vital M. Meyer vital.meyer at hbt.arch.ethz.ch > ETH Zurich http://www.bph.hbt.ethz.ch/ > Institute of Building Technologies > Chair of Building Physics Phone: +41 1 633 26 70 > ETH Hoenggerberg Fax: +41 1 633 10 41 > CH-8093 Zurich/Switzerland > ********************************************************************** > "The square on the hypotenuse equals the sum of the squares of the other > two sides. The other two sides of WHATH, I never knew." (J. O'Conner) #1-Have you tried NSolve, FindRoot or a manual implementation of Newton-Coates, Newton Raphson, Bisection, etc.? #2-It seems that you are trying to use mathematica without benefit of a copy of the mathematica book. Mathematica is a full-blown programming language, not just a collection of nifty functions. Don't be cheap. Go buy a copy of the book and browse it at your leisure. #3-No numerical programming language is a substitute for a basic understanding of numerical methods. Go to your local college bookstore and buy a copy of a numerical methods textbook. Without any idea of what is going on behind the built in routines in mathematica, you run the serious risk of having no idea what results you expect or how to formulate problems.