![\mathbf{v}(t)=\mathbf{r}'(t)=[\sin^2(3t)\mathbf{i}+3t\mathbf{j}-\cos^2(3t)\mathbf{k}]'](/tpl/images/0960/4538/47d0d.png)
How to solve this with steps? its Calculus-3
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Answers: 3
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