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February 25th, 2014, 05:23 PM  #1 
Senior Member Joined: Nov 2013 Posts: 137 Thanks: 1  "2nd tangential angle" and torsion
When I derive d?/ds I get the curvature k of a curve. But exist too the torsion ? of a curve and I think that exist some angle that when derivate wrt arc length s results in the torsion ?. So, is possible to define such angle? http://mathworld.wolfram.com/TangentialAngle.html http://mathworld.wolfram.com/FrenetFormulas.html 

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2nd tangential angle, torsion 
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