The three cubic roots of $64 \exp \left(\frac{3 \pi}{12} i ight) $ are $r \exp \left(a_{1} \pi i ight), r \exp \left(a_{2} \pi i ight), r \exp \left(a_{3} \pi i ight) $ where $a_{1} \pi, \quad a_{2} \pi, \quad a_{3} \pi$ are the three distinct principal arguments $a_{1}, a_{2}, a_{3}$ below in Increasing Order ! $$ \begin{array}{1} r= a_{1}= 1 a_{2}= a_{3}= \end{array) $$ CS.VS. 1430