Thread: polar coordinates

Determine the main set of polar coordinates of points which are rectangular coordinates:






How do I find the angle?



The answer is:

Hi Apprentice123,

Given the coordinates the angle is given by Thus in this case Note two things. The first is that is undefined so we want such that is undefined. The second is that the coordinates are in the fourth quadrant and thus so is your angle.

The answer follows.

Code:

        |
        |
----------------
        |
        |
        * (0, -2)

We see that the angle is away from the polar axis.

Thanks to all