Problem with Integration
- To: mathgroup at smc.vnet.net
- Subject: [mg22496] Problem with Integration
- From: hans.steffani at e-technik.tu-chemnitz.de (Hans Friedrich Steffani)
- Date: Wed, 8 Mar 2000 02:22:37 -0500 (EST)
- Organization: Chemnitz University of Technology
- Sender: owner-wri-mathgroup at wolfram.com
In[1]:= U[f_]:=1.0*Integrate[Cos[(f*Pi)/(180*2) + alpha],{alpha,-(Pi/3), Pi/3}]
In[2]:= U[60]
-16
Out[2]= 1.5 - 6.08617 10 I
In[3]:= Integrate[Cos[(f*Pi)/(180*2) + alpha],{alpha, -(Pi/3), Pi/3}]
f Pi
Out[3]= Sqrt[3] Cos[----]
360
Cos[f Pi/360] should be real vor any real f. How can I avoid results
like Out[2] (exepct using Chop[] or Re[])?
Hans Friedrich Steffani
PS:
Thanks for the help with my other problems last week.
h.f.s.
--
Hans Friedrich Steffani
Institut fuer Elektrische Maschinen und Antriebe, TU Chemnitz
mailto:hans.steffani at e-technik.tu-chemnitz.de
http://www.tu-chemnitz.de/~hfst/