Objectives:
1.
Review polar coordinates.

Recall that the transformation to get from polar coordinates to Cartesian coordinates is The picture relating to is shown below:

PIC
The point corresponds to the Cartesian point

Remember that polar coordinates was great for describing certain objects, such as circles.

Transform the equation into polar coordinates.
What does look like in Cartesian coordinates?
Transform the line into polar coordinates.
The line in polar coordinates becomes
The circle in polar coordinates becomes