error in integrate((sqrt(1-sin(x)*sin(x))),x,0,%pi/2);



integrate((sqrt(1-sin(x)*sin(x))),x,0,%pi/2);
gives an error:

Maxima 5.30.0 http://maxima.sourceforge.net
using Lisp SBCL 1.0.55.0-abb03f9
Distributed under the GNU Public License. See the file COPYING.
Dedicated to the memory of William Schelter.
The function bug_report() provides bug reporting information.
(%i1) integrate((sqrt(1-sin(x)*sin(x))),x,0,%pi/2);

atanh: argument 1 isn't in the domain of atanh.
 -- an error. To debug this try: debugmode(true);