November 2nd, 2010, 06:47 AM  #1 
Newbie Joined: Nov 2010 Posts: 15 Thanks: 0  Analytic Geometry
Anyone? Derive the angle between two curves on a surface. 
November 2nd, 2010, 07:02 AM  #2 
Senior Member Joined: Jul 2010 From: St. Augustine, FL., U.S.A.'s oldest city Posts: 12,209 Thanks: 517 Math Focus: Calculus/ODEs  Re: Analytic Geometry
If the two curves are given by f(x) and g(x), I would think the angle between them at a given x could be found by: 
November 2nd, 2010, 07:15 AM  #3 
Newbie Joined: Nov 2010 Posts: 15 Thanks: 0  Re: Analytic Geometry
Thanks

November 2nd, 2010, 08:43 AM  #4 
Newbie Joined: Nov 2010 Posts: 15 Thanks: 0  Re: Analytic Geometry
Can you give me the derivation, because that's what I need?

November 2nd, 2010, 01:47 PM  #5 
Senior Member Joined: Jul 2010 From: St. Augustine, FL., U.S.A.'s oldest city Posts: 12,209 Thanks: 517 Math Focus: Calculus/ODEs  Re: Analytic Geometry
There really was no derivation, this is merely the difference in slope angles.


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