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October 24th, 2017, 03:19 PM   #1
Joined: Oct 2017
From: Hamburg

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Fourier Analysis problem

Hey folks,

I don't get to the right result. I think that I've made an algebraic mistake somewhere. Checked it many times. Can anyone help me?
Not sure if this is the right way to get help here. Please correct me if I am doing something wrong! Thanks!

Last edited by gunjah292; October 24th, 2017 at 03:25 PM.
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October 24th, 2017, 05:17 PM   #2
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Line 3 of $b_n$ derivation. $2\cos n\pi$ should be $\cos 2n\pi$.
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October 25th, 2017, 01:05 AM   #3
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Thanks a lot! I should always put the arguments in brackets, as long as I am not sure with the algebra yet.
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