00:01
So something important when dealing with polar coordinates, even like the graph we just saw, is the fact that whenever we're dealing with spiral graphs, anything circular with a lot of curve to it, these types of graphs are best to graph with polar coordinates.
00:15
And the reason why that is is because a circle, for example, is angle measures with a constant radius.
00:22
So we have a constant radius at all these varying angle measures.
00:26
And for that reason, it's really helpful to use polar coordinates as opposed to rectangular coordinates.
00:32
So let's look at a good example of where we might want to use polar coordinates instead of rectangular ones.
00:39
So for this problem, it's r equals negative 2 cosine to theta.
00:46
So cosine, remember, is going to be dealing a lot with x -axis values.
00:50
So we're expecting to see the graph deal more with the x -axis than the y -axis.
00:56
So if we look at the graph here, we'll have negative 2 or r equals negative 2 cosine theta...