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## Homework Statement

Let R be the region bounded by y=tan x, y=0 and x = Pi/4

Find the volume of the solid whose base is region R and whose cross-section is a square perpendicular to the x-axis

## Homework Equations

Huh well I don't know whether its cylindrical shell:

∫

_{a}

^{b}Pi(R)(Height)dx

or disk method

∫

_{a}

^{b}A(x) dx

## The Attempt at a Solution

I can't even figure out what the graphs look like. The wording is really confusing. I tried using a pyramid shape with a square base because it says the cross section is a square and using similar triangle ( I think its called like that...) but I couldn't get the equation for the formula.