So if I wanna do this first part, f prime of g of x, f prime of g of x, well, the derivative of the natural log of x is one over x. So the derivative of natural log of x is one over x, but we don't want the derivative where the input is x. We want the derivative when the input is g of x. So instead of it being one over x, it's going to be one over g of x. One over g of x. And we know that g of x is equal to sine of x. That's equal to sine of x.