Answer
$2+2i\sqrt 3$
Work Step by Step
We know that $\cos60^{\circ}=\frac{1}{2}$ and $\sin60^{\circ}=\frac{\sqrt 3}{2}$
Substituting these values in the expression and solving:
$4(\cos60^{\circ}+i\sin60^{\circ})=4(\frac{1}{2}+\frac{\sqrt 3}{2}i)=2+2i\sqrt 3$
