Obtain the Fourier transform of the function f(t) = 2 cos 4 t - cost
Can someone help me with this? thank you.
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Fourier transform watch
- Thread Starter
- 19-08-2016 08:20
- 19-08-2016 21:12
Happy to help, if you could perhaps elaborate on which part you having trouble with?
It may help to note that this function is periodic; cos(4*t) completes a cycle at intervals of pi/2, and cos(t) completes a cycle at intervals of 2*pi, so their sum completes a cycle every 2*pi. That means you can decompose this function into a Fourier series, which is probably what you want. Do you know how to compute a Fourier series of a function?