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I'm revising my course text for my exam and came across a Fourier series problem finding the Fourier series of the square wave:

[PLAIN]http://img574.imageshack.us/img574/5862/eq1.png. [Broken]

It is then calculated that the complex Fourier coefficients are

[PLAIN]http://img232.imageshack.us/img232/5863/eq2.png [Broken]

with no intermediary calculations provided.

What I don't understand is how they got:

[PLAIN]http://img2.imageshack.us/img2/1776/eq3y.png [Broken]

Could someone please explain? Thanks :)

[PLAIN]http://img574.imageshack.us/img574/5862/eq1.png. [Broken]

It is then calculated that the complex Fourier coefficients are

[PLAIN]http://img232.imageshack.us/img232/5863/eq2.png [Broken]

with no intermediary calculations provided.

What I don't understand is how they got:

[PLAIN]http://img2.imageshack.us/img2/1776/eq3y.png [Broken]

Could someone please explain? Thanks :)

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