Example
Video Example
If the ellipse defined by the equation below is rotated counterclockwise through an angle (3\pi )/(8) about the origin, find a polar
equation and graph the resulting ellipse.
r=(10)/(3-2cos(\theta ))
Solution
We get an equation of the rotated ellipse by replacing \theta with
in the equation above.
So the new equation is r=
We use this equation to graph the rotated ellipse in the figure above. Notice that the ellipse has been rotated about its left
focus at the origin.