Chapter 12.3, Problem 26ES

Find an arc length parametrization of the curve that has the same orientation as the given curve and for which the reference point corresponds to $t=0.$

$\text{r}\left(t\right)={\cos }^{3}t\text{i}+{\sin }^{3}t\text{j;}\text{0}\le \text{t}\le \pi /2$