Re: //N bug, but WHY?

*To*: mathgroup at smc.vnet.net*Subject*: [mg58652] Re: //N bug, but WHY?*From*: David Bailey <dave at Remove_Thisdbailey.co.uk>*Date*: Tue, 12 Jul 2005 05:21:35 -0400 (EDT)*References*: <data3n$mec$1@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

Hello, The term Cosh[43Pi/Sqrt[2]] has the value 1.5263010243767756 x 10^41, and the rest of the expression has a nearly equal but opposite value - so evaluated to machine precision the subtraction leaves just noise. If you apply FullSimplify it simplifies your expression to something that has only one term - so that presumably yields the correct answer. David Bailey http://www.dbaileyconsultancy.co.uk