
Show transcribed image text Use the vector-valued function r(t) to find the principal unit normal vector N(t) using the alternative formula (v v)a – (v a)v (v . v)a – (v a)v r(t) = 7ti + 2t2j n(t) =
Use the vector-valued function r(t) to find the principal unit normal vector N(t) using the alternative formula (v v)a – (v a)v (v . v)a – (v a)v r(t) = 7ti + 2t2j n(t) =





