00:01
Okay, so for this, r equals the one plus cosine theta.
00:05
Actually, you can use the way that the book provides, right? so tests, let's see, test for theta minus theta, you know, about the polar axis.
00:22
And then you test for pi over two, right? test for whether this is symmetrical with respect to x or r equals to pi over two.
00:38
Okay, for the third step, you can test for positive r and minus r, you know, about the pole.
00:49
So then you can graph the picture of this function.
00:56
But here, actually, according to the textbook, we know that the function...