Well, then we know this limit is going to be the exact same thing as the limit of g of x as theta approaches zero. Once again, these two functions are identical, except f of x is not defined at theta equals zero, while g of x is. But the limits as theta approaches zero are going to be the same, and we've seen that in previous videos. And I know what a lot of you are thinking, Sal, this seems like a very, you know, why don't I just, you know, do this algebra here, cross these things out, and just substitute zero for theta? Well, you could do that, and you would get the answer, but you need to be clear, or it's important to be mathematically clear of what you are doing. If you do that, if you just cross these two out, and all of a sudden, your expression becomes defined at zero, you are now dealing with a different expression, or a different function definition. So to be clear, if you want to say this is the function you're finding the limit of, you have to put this constraint in to make sure it has the exact same domain.