The problem statement, all variables and given/known data Find the volume generated by revolving one arch of the curve y = 5 sin(x) about the x-axis. The attempt at a solution So I figured this would create a disc so I would have to use that the volume is ∏r^2 where r=sinx, r^2= (sin(x))^2 and that the way I should set this up is as shown: 5∏∫[sin(x)]^2 from 0 to pi. And then I would replace that with the trig identities and so on. However, this is not giving me the correct answer. Is this integral wrong?