Find the possible spectrum of the time waveforms below. I'll post the pictures of the waveforms and their solutions. I just need to know how you get to the answer.

Question

anonymous · Answer

First one.

anonymous · Answer

Answer to first one.

anonymous · Answer

Any of you familiar with signals and systems?

anonymous · Answer

By the way, you apparently don't need to work the problem out. You can just see the answer some how.

dan815 · Answer

|dw:1373141642897:dw|

anonymous · Answer

I know that the graphs are in some way inversely proportional, but there also seems to be a fourier transform I have to perform. I'm just having trouble visualizing the signal in the frequency domain. Here is another waveform.

anonymous · Answer

And its spectrum

anonymous · Answer

How do you know that is its spectrum?

dan815 · Answer

do u know how to change fourier transforms for x(t) to frequency domain

dan815 · Answer

or a frequency spectrum

dan815 · Answer

http://www.youtube.com/watch?v=dwzQnbeKnQg

anonymous · Answer

nope. I know that you have to do an integral of x(t) multiplied by e^(-jwt) and that is it.

dan815 · Answer

i cant help u much, i only had 2 lectures on Fourier series so far, which i missed lol