A bug in trig functions



Here is a strange bug in trig simplification:

GCL (GNU Common Lisp)  Version(2.4.0) Tue Jun  5 10:09:51 EDT 2001
Licensed under GNU Library General Public License
Contains Enhancements by W. Schelter
Maxima 5.6 Tue Jun 5 10:09:30 EDT 2001 (with enhancements by W. Schelter).
Licensed under the GNU Public License (see file COPYING)
(C1) declare(n,integer);

(D1) 				     DONE
(C2) sin(n*%pi/2);


Error: ((RAT) 1 2) is not of type NUMBER.
Fast links are on: do (si::use-fast-links nil) for debugging
Error signalled by MACSYMA-TOP-LEVEL.
Broken at MACSYMA-TOP-LEVEL.  Type :H for Help.
MAXIMA>>

-- 
Good luck

-Boris

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