In 1 and 2, for the given position function, find the unit tangent

Chapter 9, Problem 1

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In Problems 1 and 2, for the given position function, find the unit tangent.

\(\mathbf{r}(t)=(t \cos t-\sin t) \mathbf{i}+(t \sin t+\cos t) \mathbf{j}+t^{2} \mathbf{k}, t>0\)

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