Consider the parametrized curve given by r(t) = (cos 2t, sin 2t, t) for 0 ≤ t < ∞. Reparametrize this curve with respect to arc length then reconder the curve that you reparametrized. That is, have a look at r(t)=(cos⁡2t,sin⁡2t,t)  where 0≤t<∞  again. Calculate the curvature at the point (0,1,π4) .

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