On Jul 11, 10:00 am, "John Cremona" <[EMAIL PROTECTED]> wrote:
> I don't think that sin(10) is a "surd", though it is certainly
> irrational and probably even transcendental.
>
> If you look up definitions of "surd" online you get a quite incredible
> collection of conflicting answers, many of which (even in high school
> revision guides) are almost complete nonsense. But one thing I am
> confident about is that surds are algebraic!
>
> This is not strictly relevant to the point made by Brendan, but please
> can we have this put into the FAQ without using the word "surd"? You
> could change "surd value" to "symbolic value" here.
>
> John Cremona
>
> 2008/7/11 Jason Grout <[EMAIL PROTECTED]>:
>
>
>
> > Brendan Arnold wrote:
> >> Hi there,
>
> >> Q: How do you evaluate or convert a surd value generated by SAGE into
> >> numerical output?
>
> >> A: Use the .n() method. i.e.
>
> >> sage: sin(10)
> >> sin(10)
> >> sage: sin(10).n()
> >> -0.544021110889370
>
> >> This bugged me for ages when trying to export data to another program.
>
> >> Perhaps this should be made clearer in the tutorial? (its only used
> >> once and as an aside)
>
> > It sounds like this could be added to the FAQ if it's not already there.
> > You could add it:
>
> >http://wiki.sagemath.org/faq
>
> > Jason
Here's a proposed patch for the tutorial:
<http://trac.sagemath.org/sage_trac/ticket/3645>
It should be quick to review.
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