Answer
($2\sqrt 3+2i$)
Work Step by Step
Given complex number is 4$(\cos30^{\circ}+i\sin30^{\circ})$......(1)
We know that
$cos30^{\circ} = \frac{\sqrt 3}{2}$
$\sin30^{\circ}=\frac{1}{2}$
Plugin these values in equation (1) we get
4($\frac{\sqrt 3}{2}+\frac{i}{2}$) = 2($\sqrt 3+i$)
so the standard form is (2$\sqrt 3+2i$)