QuestionWrite the complex number in rectangular form. $$\begin{array}{l} 12\left(\cos 150^{\circ}+i \sin 150^{\circ}\right) \\ 12\left(\cos 150^{\circ}+i \sin 150^{\circ}\right)= \end{array}$$ $\square$ (Type your answer in the form a + bi. Type an exact answer, using radicals as needed.)