Re: Dot Product in Cylindrical Coordinates

*To*: mathgroup at smc.vnet.net*Subject*: [mg69230] Re: Dot Product in Cylindrical Coordinates*From*: Jean-Marc Gulliet <jeanmarc.gulliet at gmail.com>*Date*: Sun, 3 Sep 2006 01:39:30 -0400 (EDT)*Organization*: The Open University, Milton Keynes, UK*References*: <edadqd$pgc$1@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

Sergio Miguel Terrazas Porras wrote: > Hello group: > > When I calculate the dot product of vectors {1,Pi/4,0} and {2,0,1} in > Cylindrical Coordinates Mathematica 5.1 returns the result Sqrt[2], when the > result should be 2. > What is going on ? > Thanks > Sergio Terrazas > Hi Sergio, Unfortunately I don't have at hand version 5.1 but the dot product is correct with version 5.2 for Windows: Needs["Calculus`VectorAnalysis`"] SetCoordinates[Cylindrical]; {1, Pi/4, 0} . {2, 0, 1} --> 2 Regards, Jean-Marc