Re: [Axiom-developer] Expression problems

[Francois Maltey]

Hello everybody ! Hans, Bill and others...

> I am struggling with dealing with Expressions. For most sake and purposes I 
> can find a fix and solve my small problems, but I never feel very assured.

I have the same problem when I try to expand cos(2*x) in cos(x)^2-sin(x)^2.

The expand(cos(x+y)) is right, but expand (cos(2*x)) remains cos(2*x).

Martin and Bill help me, but I can't see the pretty way to write
my own expand which also compute for cos(2*x).

A possible method is here :

http://wiki.axiom-developer.org/SandBoxDistributedExpression

Have a good day !

François, I'm always waiting for a pretty expand (cos(3*x)) !