What happens when you drive a vibrating system with a square wave rather than a sine wave? Do you still…
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Adding phase-shifted sine waves
Suppose you have two sinusoidal functions with the same frequency ω but with different phases and different amplitudes: f(t) =…
Continue ReadingSine series for a sine
The Fourier series of an odd function only has sine terms—all the cosine coefficients are zero—and so the Fourier series…
Continue ReadingExact values of sine and cosine
If you know the sine of any angle, you can find its cosine from the Pythagorean theorem. And if you…
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