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I'm getting started on Fourier series but I'm confused over the formulae involved.

My lecturers notes, including Wikipedia state that, for the interval $(-\pi \le x \le \pi)$

$$a_0 = \frac1\pi \int \cdots $$

whereas videos on Youtube and other tutorials I've found seem to be using:

$$a_0 = \frac1{2\pi} \int \cdots $$

Which one am I supposed to use?

  • 11
    Three people down-voted this question. Can someone explain why?2012-11-04
  • 0
    Related: http://math.stackexchange.com/questions/227653/question-about-fourier-transform2012-11-04

3 Answers 3