So here you have, that is our g of x, it equals sine of x. And then our f of g of x is the natural log of sine of x. So this is f of g of x. F of g of x, just like that. If someone asked you just what f of x was, well, that would be natural log of x. But f of g of x is natural log of our g of x, which is natural log of sine of x. So that's the key first thing. Always make sure whether you're gonna use, especially with these transcendental functions, that hey, if this is a composition, you've gotta use the chain rule, not the product rule.