Now, cosine of zero is one, and then one minus one is zero, and sine of zero is zero, and you square it, you still got zero, and you multiply it times two, you still got zero, so you got zero over zero. So once again, we have that indeterminate form. And once again, this indeterminate form, when you have zero over zero, doesn't mean to give up, it doesn't mean that the limit doesn't exist, it just means, well, maybe there's some other approaches here to work on. If you got some non-zero number divided by zero, then you say, okay, that limit doesn't exist, and you'd say, well, you'd just say it doesn't exist. But let's see what we can do to maybe think about this expression in a different way. So if we said, so let's just say that this, let me use some other colors here. Let's say that this right over here is f of x.