And this time, let me make some sufficiently large brackets. So now this is cosine of x over sine of x. Over sine of x. But once again, we can use the quotient rule here. So this is going to be the derivative of the top function, which is negative, we're doing that magenta color, that is negative sine of x times the bottom function. So times sine of x, sine of x, minus, minus the top function, cosine of x, cosine of x, times the derivative of the bottom function, which is just going to be another cosine of x, and then all of that over the bottom function squared. So sine of x squared.