# Imagine that!

Look at a few graphs of periodic odd functions e.g. y=sin(pi*t), a triangular and square wave with phase pi/2, and look at their frequency spectrum in real/imaginary form.

What do you notice? Explain this with reference to the trigonometric form of the Fourier series.

#periodicfunctions #oddfunctions #triangularwave #squarewave #frequencyanalysis #fouriertransform #fourierseries #dsp

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