Rectangular Pulse and Its Fourier Transform - Wolfram Demonstrations Project
Convolution in the Frequency Domain and Time Domain from Simulation Data
TheFourierTransform.com - Fourier Transform of the Box Function
I wanted to calculate the Fourier transform of sin(at) and ended up that it's indeterminate. Wolfram Alpha says tho that the answer has to do with the Dirac delta function. Where did