On Nov 25, 2008, at 11:08 PM, Tim Lahey wrote:
>
> Hi,
>
> I'm comparing two results in an automated fashion and I've
> run into a snag. One of the results is: asin(x/a) and
> the other is calculated to be asin(x/sqrt(a^2)). If I let
> Sage (well, Maxima) simplify the latter, it will give me,
> asin(x/abs(a)). I'd like it if I could get asin(x/a). Is
> there some way of enforcing sqrt(a^2) = a?
>
> Thanks,
>
> Tim.
Yes, there is.
sage: var('a')
sage: assume(a>=0)
sage: sqrt(a^2)
a
- Robert
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