On Wed, 2007-05-16 at 06:23 -0400, sen1 at math.msu.edu wrote: . . . > Also, it is curious that Maple 10 returns > sin(x)^2/2 > while Mathematica 3.0 returns > -cos(x)^2/2 FWIW Axiom Version April 2006 also returns -cos(x)^2/2 -- Bill Wood