Answer
$\left( 5.385,2.761 \right)$
Work Step by Step
To determine the polar coordinate from the rectangular coordinate, follow the following steps:
Step I: Press 2nd and then press the APPS key to open Angle Menu.
Step II: Press 5.
Step III: Enter the point $\left( x,y \right)$ and press enter to display r in the $\left( r,\theta \right)$ rectangular form of the point.
Thus, $r=5.385$
Step IV: Follow Step I and Step II and then press 6.
Step V: Enter the point $\left( x,y \right)$ and press enter to display $\theta $ in the $\left( r,\theta \right)$ polar form of the point.
Thus, $\theta =2.761$
Hence, the polar coordinate of $\left( -5,2 \right)$ is $\left( 5.385,2.761 \right)$.
