Well, I can rewrite the whole thing as the limit as x approaches zero. So one minus cosine of x times one plus cosine of x. Well, that is just going to be, let me do this in another color. That is going to be one squared, which is just one, minus cosine squared of x. Cosine squared of x, difference of squares. And then in the denominator, I am going to have these, which is just x times one plus cosine of x. Now what is one minus cosine squared of x? Well, this comes straight out of the Pythagorean identity, trig identity.