If you were to graph tan of x, you would see a vertical asymptote at pi over two. Let's do one more of these. So let's say the limit as x approaches pi of cotangent of x. Pause the video and see if you can figure out what that's going to be. Well, one way to think about it, cotangent of x, it's one over tangent of x, it's cosine of x over sine of x. It's sine of x. This is the limit as x approaches pi of this.