Answer
$$5 + 0i$$
Work Step by Step
$$\eqalign{
& \frac{{5\operatorname{cis} 50,000^\circ }}{{\operatorname{cis} 50,000^\circ }} \cr
& = 5\operatorname{cis} \left( {50,000^\circ - 50,000^\circ } \right) \cr
& = 5\operatorname{cis} \left( {0^\circ } \right) \cr
& = 5\cos 0^\circ + 5i\sin 0^\circ \cr
& = 5 + 0i \cr} $$
