Proof of Fourier Series Coeffecients

  • Thread starter podjackel
  • Start date
  • #1
2
0

Homework Statement



#35 on this page


Homework Equations



Integral of a series can be assumed to be the sum of integrals

The Attempt at a Solution



Picture of Work

I am not sure where to proceed from here, advice?
 

Answers and Replies

  • #2
341
51
Try to explicitely calculate

[tex]\int_0^\lambda A_n \cos(\frac{2\pi n}{\lambda}x)dx[/tex]
 
  • #3
329
34
Try to explicitely calculate

[tex]\int_0^\lambda A_n \cos(\frac{2\pi n}{\lambda}x)dx[/tex]

This is good advice.
 
  • #4
2
0
Ahh, that whole scary monster is zero! Thanks for the advice. :)
 
  • #5
329
34
Keep an eye on periodicity. It can save you a lot of work.
 

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