1. The problem statement, all variables and given/known data A represents the 1st quadrant area bounded by f(x)=e^(-tanx), y=.01, y=.09, and the y-axis. Write an integral expression for the volume of the figure that results from revolving A around the line x=30. 2. Relevant equations 3. The attempt at a solution So, I know that I have to integrate sideways. To do that, I tried putting the equation y=e^(-tanx) into x= form: y=e^(-tanx) -tanx=lny tanx=-lny x=invtan(-lny) So now, I'm not sure what to to. I think you have to integrate sideways somehow and then revolve it around the verticle line x=30...?