confusion with triple integral...

*To*: mathgroup at smc.vnet.net*Subject*: [mg32469] confusion with triple integral...*From*: Bradley Stoll <BradleyS at Harker.org>*Date*: Tue, 22 Jan 2002 03:19:49 -0500 (EST)*Sender*: owner-wri-mathgroup at wolfram.com

Please consider the Integral[r^2Sin[x]drdxdy] with limits as follows: [0,2Pi]for y, [0,ArcCos[1/4]] for x and [0,1/Cos[x]] for r. Mathematica returns 27Pi, which is correct. But, if instead of using ArcCos[1/4], I use either ArcCos[0.25] or ArcCos[1/4]//N in the limits, Mathematica returns 43Pi. Any idea why?j Bradley Stoll San Jose, CA

**Follow-Ups**:**Re: confusion with triple integral...***From:*Tomas Garza <tgarza01@prodigy.net.mx>