On Sat, Mar 21, 2009 at 5:58 AM, Vinzent Steinberg
<vinzent.steinb...@googlemail.com> wrote:
>
> What is the best way to replace tan(x) with sin(x)/cos(x)?
>
> *.match() does not seem to be suited, because I don't care where tan
> (x) occurs, I just want to replace it.
> WildFunction() seems to be broken.
That's a good question. You need to know the argument of tan(x). If
it's just x, then:
I would use:
e.subs(tan(x), sin(x)/cos(x))
I think we should maybe enhance our .match() or introduce .find() so
that one can do e.find(tan(Wild("a"))) and it would return tan(x**2)
or whatever is in the expression. Then you can use .subs() to
substitute it.
Ondrej
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