It keeps it a little bit simpler, at least in my brain. When we're applying the chain rule, it's going to be the derivative of tangent of y with respect to y times the derivative of y with respect to x. On the right-hand side, the derivative of x with respect to x is going to be equal to 1. If we want to solve for the derivative of y with respect to x, we just multiply both sides times the cosine of y squared. We get the derivative of y with respect to x is equal to cosine of y squared. Like we've seen in previous videos, this isn't that satisfying. I've written the derivative of y with respect to x as a function of y.