Find the Following for the Complex Numbers 3 Cis $240^{\circ}$ And $2+2 i \sqrt{3}$

Short Answer

Find the following for the complex numbers 3 cis $240^{\circ}$ and $2+2 i \sqrt{3}$ :
(a) the rectangular form of 3 cis $240^{\circ}$ .
(b) the trigonometric form of $2+2 i \sqrt{3}$ .
(c) their resultant in the form $a+b i$ .