# Graph expression for fourier series

Discussion in 'Math' started by smarch, Dec 18, 2010.

1. ### smarch Thread Starter Active Member

Mar 14, 2009
52
0
Can someone help me out. How would you write a mathematical expression for the graph that is attached. f(t) = ? 0 < t < 2pi

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2. ### mik3 Senior Member

Feb 4, 2008
4,846
65
This has the form:

y=a*t

In this case, $a=\frac{A}{T}$

Jul 7, 2009
1,585
141
You typed in that you need the functional expression over the interval from 0 to 2pi. The sawtooth waveform you provided the picture for has a period of 2. There's no simple way to write a single formula without using things like the unit step function (so as to be able to handle three discontinuities in that interval). Your interval could also be a typo, so you need to amend your post and make sure we know exactly what you want.

It helps a great deal if you tell us what you're trying to accomplish or at least if you can describe a little about the context of your question.

4. ### mik3 Senior Member

Feb 4, 2008
4,846
65
I think he wants to find the equation of the waveform shown from 0 to T as to find its fourier series.