For example: The curve $$y= 0.001sec(x) $$ is rotated 2π rad about the x axis to form a soild.
Calculate the mean cross sectional area of this solid in the range $[0,\pi/4]$
I am having great trouble in figuring out a method to solve this questions. Any help will be great.
(Also I have though about using the mean value of $sec(x)$ with in the range but most likely that will not work as the cross sectional area will be $sec^2(x)dx$