Can anyone help me with this problem. I'm stuck, and I don't know what else to try. Thanks for any help.

The solid lies between planes perpendicular to the x-axis at x = -pi/3 and x = pi/3. The cross sections perpendicular to the x-axis are

a) circular disks with diameters running from the curve y = tanx to the curve y = sec x

b) squares whose bases run from the curve y = tan x to the curve y = sec x