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## Homework Statement

[tex]Si(x) = \int_{0}^{x}{\frac{sin(t)}{t} dt[/tex]

At what values of x does this function have a local maximum?

**2.Solutions**

[PLAIN]http://img833.imageshack.us/img833/701/27444263.png [Broken]

## The Attempt at a Solution

So I took the derivative and applying FTC and I got sin(x)/x = 0

sin(x) = 0

[tex]x=n\pi[/tex]

Then I drew a number line and I got lost. I looked at the solutions and I was even more lost. This is due tomorrow please help

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