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## Homework Statement

Determine the first three terms in the Fourier trigonometric series for the function shown below.

## Homework Equations

Look at attached jpeg. This tex tool is terrible. After making correction to the code, the preview still shows previous preview posts.

## The Attempt at a Solution

See attached jpeg for solution and the other attachment for the function. Did I define the function correctly? I didn't solve for b

_{n}because this function is symmetric about the y-axis.

First three terms mean a

_{0}, a

_{1}, and a

_{2}right?

Or is it n=1, 2, 3