Answer
$\textbf{T}(t) = \frac{\textbf{r}'(t)}{|\textbf{r}'(t)|}$
Where $\textbf{T}(t)$ is a Unit Tangent Vector and $\textbf{r}'(t)$ is a Tangent Vector on an oriented curve:
Work Step by Step
Definition of Unit Tangent Vector
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