So this is all going to be equal to, this is equal to one. Let me take that one over pi. So this is equal to one over pi times, now we're going to evaluate, so the antiderivative here we just said is sine, sine of pi x, and we're going to evaluate that at one and at zero. So this is going to be equal to one over pi, one over pi, not pi, my hand is not listening to my mouth, one over pi times sine of pi, sine of pi minus sine of, minus sine of pi times zero, which is just zero. Well sine of pi, that's zero. Sine of zero is zero. So you're going to have one over pi times zero minus zero.