Question: In Exercises use the vector-valued function r(t) to find the principal unit normal vector N(t) using the alternative formula N = (vv)a ||(vv)a (v a)v

In Exercises use the vector-valued function r(t) to find the principal unit normal vector N(t) using the alternative formula

N = (vv)a ||(vv)a (v a)v (va)v||*

N = (vv)a ||(vv)a (v a)v (va)v||*

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