Incorrect result in simple integral: integrate(sqrt(sin(t)^2+cos(t)^2), t, 0, 2*%pi)

Could you please report this bug using the sourceforge bug tracking system?
That will ensure that we don't lose track of it.

Of course, even better if your users could do this for you!

bug_report() gives instructions:

The Maxima bug database is available at
    http://sourceforge.net/tracker/?atid=104933&group_id=4933&func=browse
Submit bug reports by following the 'Submit New' link on that page.
Please include the following build information with your bug report:
-------------------------------------------------------------

Maxima version: XXX
Maxima build date: XXX
host type: XXX
lisp-implementation-type: XXX
lisp-implementation-version: XXX

-------------------------------------------------------------
The above information is also available from the Maxima function
build_info().



On Fri, Oct 16, 2009 at 4:51 PM, Robert Marik <marik at mendelu.cz> wrote:

> Dear Maxima developers
>
> the following integral is evaluated in Maxima into %pi, but it should be
> 2*%pi
>
> integrate(sqrt(sin(t)^2+cos(t)^2),t,0,2*%pi)
>
> Do you know about this bug? This bug has been reported on Sage forum
>
> http://groups.google.cz/group/sage-devel/browse_thread/thread/f82e24efdfe23b07
>
>
> Old Maxima gives correct result.
>
> Maxima 5.13.0 http://maxima.sourceforge.net
> Using Lisp GNU Common Lisp (GCL) GCL 2.6.7 (aka GCL)
> Distributed under the GNU Public License. See the file COPYING.
> Dedicated to the memory of William Schelter.
> This is a development version of Maxima. The function bug_report()
> provides bug reporting information.
>                                  2         2
> (%i1)           integrate(sqrt(sin (x) + cos (x)), x, 0, 2 %pi)
> (%o1)                                2 %pi
>
>
> The Maxima included in Sage gives %pi. According to kcrisman, the CVS
> version
> has the same problem.
>
> marik at asus-eee:/opt/sage$ ./sage
> ----------------------------------------------------------------------
> | Sage Version 4.1.2, Release Date: 2009-10-14                       |
> | Type notebook() for the GUI, and license() for information.        |
> ----------------------------------------------------------------------
> sage: maxima("integrate(sqrt(sin(t)^2+cos(t)^2),t,0,2*%pi)")
> %pi
> sage:
>
>
>
>
> Yours sincerely
> Robert Marik
>
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