# Math Help - solid of revolution

1. ## solid of revolution

Hi there i'm pretty stuck on where to start and what to do with the following question

Find the volume of the solid of revolution obtained by rotating, a full turn about the x-axis, the area between the x-axis and the curve y = 2 sin x, for x ∈ [ π , 3π ].

Thanks
if anyone can help me out

2. Originally Posted by jimmy
Hi there i'm pretty stuck on where to start and what to do with the following question

Find the volume of the solid of revolution obtained by rotating, a full turn about the x-axis, the area between the x-axis and the curve y = 2 sin x, for x ∈ [ π , 3π ].

Thanks
if anyone can help me out
$V_{x-axis}=\pi\int_a^b\left[f(x)\right]^2dx$