# Changing limits of integration

[SOLVED] Changing limits of integration

## Homework Statement

Given:

$$\int_{y=0}^\pi\int_{x= y}^{\pi}\frac{sinx}{x} dxdy$$

Change the order of integration and evaluate the double integral.

## Homework Equations

My professor told me, "This integral cannot be expressed in terms of elementary functions". I'm not exactly sure what that means.

## The Attempt at a Solution

sinx/x has always been a very common problem for differentiation and integration, so I'm confident I can solve this with a simple substitution. I'm trying to figure out, however, what they mean by not being able to be expressed in terms of "elementary functions".