Hello List I tried Sage for simplifying some trigonometric expressions.
sage: a=cos(pi/11)+cos(3*pi/11)+cos(5*pi/11)+cos(7*pi/11)+cos(9*pi/11) sage: a.simplify_trig() cos(pi/11)+cos(3*pi/11)+cos(5*pi/11)+cos(7*pi/11)+cos(9*pi/11) This sum is equal to 1/2 then I try: sage: a=cos(pi/11)+cos(3*pi/11)+cos(5*pi/11)+cos(7*pi/11)+cos(9*pi/ 11)-1/2 sage: a.simplify_trig() cos(pi/11)+cos(3*pi/11)+cos(5*pi/11)+cos(7*pi/11)+cos(9*pi/11)-1/2 I try with simplify_full() too, no more result. Another example: sage: b=atan(2)+atan(5)+atan(8) sage: b.simplify_full() atan(2)+atan(5)+atan(8) This sum is equal to 5*pi/4 The only thing I succed to do is: sage: b=atan(2)+atan(5)+atan(8) sage: simplify_trig(tan(b)) 1 If you have any idea to give those results, thanks in advance -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
