Or another way to say it, your net area is negative 1. So it's taking the one region above the x-axis and then subtracting the two below it. So what the definite integral is doing when we evaluate it using the second fundamental theorem of calculus, it's essentially finding the net area above the x-axis. And if we get a negative number, that means that the net area is that actually most of the area is below the x-axis. If we get 0, then that means it all nets out. And if you want to see a case at 0, take the integral from 0 all the way to 2 pi. And this will evaluate to 0 because you have an area of 1 and another area of 1.