Unformatted text preview: a cos t ) i + ( a sin t ) j and conﬁrm that this agrees with the geometric interpretation of the curvature as the reciprocal of the radius of the osculating circle. C. Compute the curvature of the helix h cos t, sin t,t i . (Hint: Before you dive in and compute a parametrization of the curve by arclength, see if one of the formulas for curvature gives us the answer with less work.) D. Consider the curve r ( t ) = h et cos t,et sin t,et i , t ≥ 0. Compute the curvature and show that it goes to inﬁnity as t → ∞ ....
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 Fall '11
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 Math, International System of Units, Conversion of units

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