Chapter 12.4, Problem 14ES

Use the result in Exercise 3 to find parametric equation for the tangent line to the graph of $\text{r}\left(t\right)$ at $t_0$ in terms of arc length s.

$\text{r}\left(t\right)=t\text{i}+tj+\sqrt{9-t^2}\text{k};t_0=1$