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MATLAB Central > MATLAB Newsreader > Intersection between two cones 

I have two 3d circles (centre coordiantes and radii) with their normals passing through origin. If you consider the origin to be the vertex of a right cone having the circle as the base, how can I determine if there is an intersection between these cones? 
Subject: Intersection between two cones From: Bruno Luong Date: 6 Feb, 2013 07:59:09 Message: 2 of 7 
"Doctor61" wrote in message <ket0to$214$1@newscl01ah.mathworks.com>... 
Subject: Intersection between two cones From: Bill Whiten Date: 6 Feb, 2013 11:21:08 Message: 3 of 7 
"Doctor61" wrote in message <ket0to$214$1@newscl01ah.mathworks.com>... 
"Bill Whiten" <W.Whiten@uq.edu.au> wrote in message <keteb4$gmc$1@newscl01ah.mathworks.com>... 
"Bill Whiten" <W.Whiten@uq.edu.au> wrote in message <keteb4$gmc$1@newscl01ah.mathworks.com>... 
Subject: Intersection between two cones From: Bruno Luong Date: 7 Feb, 2013 08:17:19 Message: 6 of 7 
"Doctor61" wrote in message <kevm5s$fnm$1@newscl01ah.mathworks.com>... 
Subject: Intersection between two cones From: Bill Whiten Date: 7 Feb, 2013 09:36:05 Message: 7 of 7 
"Doctor61" wrote in message <kevmfe$gku$1@newscl01ah.mathworks.com>... 
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