On Tue, Apr 15, 2008 at 11:22 AM, Reckoner <[EMAIL PROTECTED]> wrote:
>
>
> Suppose I have something like:
>
> sage: x,y,z=var('x y z')
> sage: eq = cos(x)*sin(y)*tan(x)
>
> and I want to substitute a value for x, say, x=5. Then,
> I would have
>
> eq = cos(5)*sin(y)*tan(5)
>
> which is what I get when I do .substitute() in sage. However, I want
> this partially numerically evaluated to obtain
>
> eq = 0.28366*sin(y)*(-3.38051)
>
> How can I do this?
sage: x,y,z=var('x y z')
sage: eq = cos(x)*sin(y)*tan(x)
sage: eq(x=5.0)
-0.958924274663139*sin(y)
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