MathCad integral help :)

[qbox]

Hi
I try to use for the first time MathCad 2000 to calculate one integral for school. i need to calculate this integral somehow Symbolic with MathCad
http://ubuntuforums.org/attachment.php?attachmentid=68898&stc=1&d=1210008741
I do Symbolic->Evaluate->Symbolically
and I receive this
http://ubuntuforums.org/attachment.php?attachmentid=68899&stc=1&d=1210008741
I dont know this is right result or its wrong?
i didnt expect erf(pi) to show up.:confused::confused::confused:
Can same one tell me if Im right or im wrong?
And if I select variable "x" and I do Symbolic->Variable->Integrate
i have this
http://ubuntuforums.org/attachment.php?attachmentid=68900&stc=1&d=1210008741

Please if anyone know to work with MathCad, please tell me if Im wrong and If im right and what to do.
thx

[Lux Perpetua]

I hate to be the one to tell you this, but I believe that your integral has no analytic solution. The integral from 0 to infinity of e^(-x^2) does have an analytic solution, namely sqrt(pi)/2, but I don't think there is such a result for the integral from 0 to pi.

By the way, see this Mathworld article for the definition of erf: the "error function" (http://mathworld.wolfram.com/Erf.html) (Mathworld)

As you can see, sqrt(pi)/2*erf(pi) is indeed equal to your integral, basically by definition.

[qbox]

Thanks. That help me to figure out.:guitar: