Re: Integrate problem?
- To: mathgroup at smc.vnet.net
- Subject: [mg62114] Re: Integrate problem?
- From: Jean-Marc Gulliet <jeanmarc.gulliet at gmail.com>
- Date: Sat, 12 Nov 2005 03:31:11 -0500 (EST)
- Organization: The Open University, Milton Keynes, UK
- References: <dl1j6h$t54$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Martin Manscher wrote:
> In[48]:=
> Integrate[Sin[t]Sign[Sin[.999t]],{t,0,2p}]
>
> Out[48]=
> 2. - 1.91585*10^-14 I
>
> In[49]:=
> NIntegrate[Sin[t]Sign[Sin[.999t]],{t,0,2p}]
>
> Out[49]=
> 4.
>
> Why?
> /Martin
>
Hi Martin,
What version and platform are you using?
Assuming that 2p stands for 2Pi
In[1]:=
Integrate[Sin[t]*Sign[Sin[0.999*t]], {t, 0, 2*Pi}]
Out[1]=
3.99999
In[2]:=
NIntegrate[Sin[t]*Sign[Sin[0.999*t]], {t, 0, 2*Pi}]
Out[2]=
3.99999
In[3]:=
$Version
Out[3]=
5.2 for Microsoft Windows (June 20, 2005)
Best regards,
/J.M.