Give the following in polar form : \[ \begin{array}{r} {\left[3\lef...

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Give the following in polar form :
\[
\begin{array}{r}
{\left[3\left(\cos 225^{\circ}+i \sin 225^{\circ}\right)\right]\left[6 \left(\cos 45^{\circ}\right.\right.} \\
\left.\left.+i \sin 45^{\circ}\right)\right] .
\end{array}
\]
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