Rectangular → polar

Convert the point with $\displaystyle x = 6$ and $\displaystyle y = 4$. The drawing shows it: 6 across and 4 up, and the question marks are what we are looking for, $\displaystyle r$ and $\displaystyle \theta$. Press and for Pol. Type 6, then press and for the comma, and type 4. Press and . $\displaystyle r$ is r=7.211102551. In natural display the two answers share one line, so $\displaystyle \theta$ is cut off. Press to see it: $\displaystyle \theta$ is θ=33.69006753 degrees.

▶ Watch this step in the video (31:34)