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Integrate problem?

• To: mathgroup at smc.vnet.net
• Subject: [mg62090] Integrate problem?
• From: "Martin Manscher" <mm01 at danfoss.com>
• Date: Fri, 11 Nov 2005 02:51:53 -0500 (EST)
• Sender: owner-wri-mathgroup at wolfram.com

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