Two cars leave an intersection with car A traveling due west at a constant speed of $20.0$

mph $($as measured by the ground$)$ and car B traveling at a constant speed of $30\mathrm{.}0$ mph in a

direction of $$ south of east $($also as measured by the ground$).$ If the speed of car B as

measured by car A is $44.2$ mph$,$ determine the value of the angle $.$