## Precalculus (6th Edition) Blitzer

$\left( -0.670,5.157 \right)$
To determine the rectangular coordinate from the polar coordinate, follow these steps: Step I: Press 2nd and then press the APPS key to open the Angle Menu. Step II: Press 7. Step III: Enter the point $\left( r,\theta \right)$ and press enter to display x in the $\left( x,y \right)$ rectangular form of the point. Thus, $x=-0.670$ Step IV: Follow Step I and Step II and then press 8. Step V: Enter the point $\left( r,\theta \right)$ and press enter to display y in the $\left( x,y \right)$ rectangular form of the point. Thus, $y=5.157$ Hence, the rectangular coordinate of $\left( 5.2,1.7 \right)$ is $\left( -0.670,5.157 \right)$.