Re: Problem: Integrate
- To: mathgroup at smc.vnet.net
- Subject: [mg33619] Re: [mg33589] Problem: Integrate
- From: BobHanlon at aol.com
- Date: Wed, 3 Apr 2002 18:08:27 -0500 (EST)
- Sender: owner-wri-mathgroup at wolfram.com
In a message dated 4/3/02 1:44:11 AM, abaehr at srt.tu-darmstadt.de writes:
>for
>Integrate[ -1 + Cos[\[Theta]]\^2 + Sin[\[Theta]]\^2,
>\ {\[Theta], 0, 2 \[Pi]}]
>
>I get the result
>
>ComplexInfinity
>
>though the result is obviously zero. The Calculation is OK if I remove
>one of the three terms, such that the result is no longer zero.
>
>Is this a bug?
>
I get the same error. Whenever a problem arises, one workaround
that frequently helps is to Simplify (or FullSimplify) expressions prior
to the operation that is causing a problem.
$Version
4.1 for Mac OS X (November 5, 2001)
Integrate[Simplify[-1 + Cos[th]^2 + Sin[th]^2],
{th, 0, 2*Pi}]
0
Bob Hanlon
Chantilly, VA USA