Given the vector $\displaystyle \vec{{u}}={\left\langle{8},-{10}\right\rangle}$, determine the magnitude and angle of the vector (measured counterclockwise from the positive x-axis, $\displaystyle {0}^{\circ}\le\theta\lt{360}^{\circ}$). Give the exact magnitude and $\displaystyle \theta$  to 3 decimal places.

$\displaystyle {\left|{\left|\vec{{u}}\right|}\right|}$ = Preview Question 1 Part 1 of 2  

$\displaystyle \theta$ = degrees