Answer
$${\text{divide,}}\,\,\,{\text{subtract}}$$
Work Step by Step
$$\eqalign{
& {\text{When dividing two complex numbers in trigonometric form}}, \cr
& {\text{we }}\underline {{\text{divide}}} {\text{ their absolute values and }}\underline {{\text{subtract}}} {\text{ their arguments}}. \cr} $$
