(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

http://www.mathhelpforum.com/math-help/attachments/f6/22423d1317129472-curvature-torsion-untitled.png [Broken]

3. The attempt at a solution

What I did was I calculated the unit vector for dN/ds={.21i+0.91j-0.42k}/ sqrt(.21^2+.91^2+0.42^2)=.205i+0.889j-.4102k

then, I took a derivative of N

since N=BxT,

dN/ds=(dB/ds)xT+Bx(dT/ds)

then taking T and doing dot product on both sides:

T⋅(dN/ds)=T⋅(dB/ds)xT+Bx(dT/ds) which simplifies to:

T⋅(dN/ds)=dB/ds

T⋅(dN/ds)=-τN

From here I have no clue what I should be doing..

Any suggestions will be greatly appreciated

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# Homework Help: Curvature and Torsion

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