Calculus
Volumes - Disks and Shells

I. Disk Method

      A. Use the Disk Method if
            (1) the function is in terms of x and rotation is about the x-axis
                       

        or (2) the function is in terms of y and rotation is about the y-axis
                       

II. Shell Method

      A. Use the Shell Method if
            (1) the function is in terms of x and rotation is about the y-axis
                       

        or (2) the function is in terms of y and rotation is about the x-axis
                       
     

Send any comments or questions to: David Pleacher