Find \( \mathrm{r} \rightarrow{ }^{\prime}(\mathrm{t}) \), given \( \mathrm{r} \rightarrow(\mathrm{t})=\left\langle-5 \cos (3 \mathrm{t}),-4 \mathrm{e}^{\mathrm{t}},-3 \sin (-3 \mathrm{t})\right\rangle \).
\[
\mathrm{r}^{\prime}(\mathrm{t})=\langle\ldots, \quad, \quad, \quad>
\]
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\[
\begin{array}{l}
O<15 \sin (3 t),-4 e^{t}, 9 \cos (-3 t)> \\
O<10 \cos (3 t),-5 e^{t}, 8 \sin (-3 t)> \\
O<8 \cos (2 t),-9 e^{t}, 8 \sin (-2 t)> \\
O<8 \sin (8 t),-6 e^{t}, 8 \sin (-3 t)>
\end{array}
\]
