Re: Some assistance from seasoned users.

*To*: mathgroup at smc.vnet.net*Subject*: [mg124916] Re: Some assistance from seasoned users.*From*: Bill Rowe <readnews at sbcglobal.net>*Date*: Sun, 12 Feb 2012 05:01:21 -0500 (EST)*Delivered-to*: l-mathgroup@mail-archive0.wolfram.com

On 2/11/12 at 6:35 AM, peter.livingston at cox.net (peter livingston) wrote: >My specific question is this: why am I able to get Mathematica to do >the complete integral of sin(x)/x, but it refuses to do any of the >other types: specifically sin^3[x]/x or sin^3[x]/x^3 over the half >interval from zero to infinity. You didn't state what you tried or what version of Mathematica you are using. I have no problem with either of the above integrals. That is: In[2]:= Integrate[Sin[x]^3/x, {x, 0, Infinity}] Out[2]= \[Pi]/4 In[3]:= Integrate[Sin[x]^3/x^3, {x, 0, Infinity}] Out[3]= (3 \[Pi])/8 In[4]:= $Version Out[4]= 8.0 for Mac OS X x86 (64-bit) (October 5, 2011)