- #1
DrOnline
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Homework Statement
Find the Fourier series representation of:
f(t)={-t , -∏<t<0
f(t)={0 , 0<t<∏
This is a piecewise function.
T=2∏ (the period)
Homework Equations
[tex]a_{0}=\frac{2}{T}*\int_0^T f(t),dt[/tex]
The Attempt at a Solution
I need help only with calculating the DC component. Once I get that working, I can continue on my own. Tried multiple times, I keep getting pi/2.
The correct answer should be pi/4.
This is my graph:
Is this graph correct?
I consider the area of the function from -pi to 0 identical if I change it from:
f(t)=-t -∏<t<0
to
f(t)=t 0<t<∏
Is this permitted? Surely it's the same result. Seems alright to me
[tex]a_{0}=\frac{2}{2\pi}*\int_0^∏ -t,dt[/tex]
[tex]a_{0}=\frac{1}{\pi}*(\frac{\pi^2}{2}-0)[/tex]
[tex]a_{0}=\frac{\pi}{2}[/tex]
And the book says it should be pi/4.
What am I doing wrong? Is my graph correct? Is my integration correct? Is the book's solution wrong?