binormal
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Suppose a twisted curve is defined in terms of the arclength s by
r(s)=sech(?)cos(s)i+sech(?)sin(s)j+tanh(?)k,
where ? is a constant parameter. Determine
(i) the tangent t(s),
(ii) the normal n(s),
(iii) the binormal b(s),
(iv) the curvature ?,
(v) the torsion Ï?.
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The expert examines binormal twisted curves.
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