KhiCAS, le moteur formel Giac/Xcas pour toutes TI-Nspire

[r4nd0mdvr]

ok...let me try.

It works! Thanks a lot for the help!

[r4nd0mdvr]

Does anyone know a good amount in writing functions in khiCAS? Lets say for example area of a rectangle (baseXheight)..how would I write this? And is it possible for me to give the ending result (area) and lets say base, and get the height; without rewriting the function over? Example Please!

French: Est-ce que quelqu'un connait un bon montant en fonctions écrivant dans khiCAS? Disons par exemple que aire d'un rectangle (baseXheight) .. comment pourrais-je écrire cela? Et est-il possible pour moi de donner le résultat de fin (zone) et permet de dire que la base, et d'obtenir la hauteur; sans avoir à réécrire la fonction terminée? Exemple S'il vous plaît!

[GalacticPirate]

Search the XCAS (excas, yes) documentation on Google, since khicas is completely base on it

[r4nd0mdvr]

the XCAS documentation doesn't have what i'm looking for... anyone that can answer my question?

[parisse]

Area(h,w):=h*w;
solve(Area(h,w),w);

[r4nd0mdvr]

When I put in sin(X)/cos(X), I just jet the same thing back instead of the correct answer; tan(X). What am I doing wrong?

PS. Thanks for the help on formulas parisse

[Bisam]

Why would that be THE correct answer ?
In that case, this is clearly the same... but for example, is

$mathjax$\frac{\cos(x)}{\sin(x)}$mathjax$

the same as

$mathjax$\frac{1}{\tan(x)}$mathjax$

? The answer is... NO. If

$mathjax$x=\frac{\pi}{2}$mathjax$

, the latter is not defined whereas the first is 0.

No simplification at all is often A good answer, even though it is not always the best for you.

Parisse may have a better answer.

[r4nd0mdvr]

I don't understand what you are saying. tan(x) is the proper answer an algebra solver should return. I'm pretty sure i'm entering it in wrong.

[parisse]

There are several commands to rewrite an expression to fit your needs. For example here trigtan will rewrite your expression with tan.

[r4nd0mdvr]

Hi, thanks for the quick reply. I know how to enter it in, however I believe I am entering it in wrong in order for me to get back tan(x) when I enter sin(x)/cos(x).