help with washers method about a line :( 1. The problem statement, all variables and given/known data We are given two curves y=sin(x) and y=0. Use washers to revolve this around the line y=-2 from 0 to pi. 2. Relevant equations 3. The attempt at a solution I kno that the equation is 2pi Int( height x radius x thickness), but i have absolutely no idea what to plug in and how to figure out where these things come from :( I kno how to do it about the x axis, by using pi Int(R(x)-r(x))dx but how do i do it about the line y=-2?