And I will give you two hints. First hint is, well, we don't know what the derivative of sine inverse of x is, but we do know what the derivative of the sine of something is. And so maybe if you rearrange this and use some implicit differentiation, maybe you can figure out what dy dx is. Remember, this right over here, this right over here is our goal. We essentially want to figure out the derivative of this with respect to x. So I'm assuming you've had a go at it, so let's work through this together. So if y is the inverse sine of x, that's just like saying that, that's equivalent to saying that sine of y is equal to x.