Re: Integration variables
- To: mathgroup at smc.vnet.net
- Subject: [mg78367] Re: Integration variables
- From: dimitris <dimmechan at yahoo.com>
- Date: Fri, 29 Jun 2007 05:46:41 -0400 (EDT)
- References: <f5vr6e$j12$1@smc.vnet.net>
Show as your integral please.
Dimitris
mattew :
> Hi everybody, Mathematica gives us the possibility to use spherical coordinates (r,Ttheta,Pphi): I'm trying to write an integral in the polar angle Ttheta of the form:
>
> Integral in [-1,1] Ttheta dCos(Ttheta)
>
> where Ttheta is the polar angle and the integration variable is the cosine of Ttheta in the interval [-1,1].
>
> I got the following error:
>
> ntegrate::ivar: "Cos[Ttheta] is not a valid variable."
>
> Does anyone knows the reason for that?
>
> p.s: It happens with any system of coordinates, actually.