Here is a document that derives many things from scratch and answers the question about how far the Moon falls.

# Category: Math and Physics Documents

# Circles to Sines to Fourier

Here’s an interesting video that shows how circles morph into sines and then how infinite sines make up each complex waveform.

More: https://betterexplained.com/articles/an-interactive-guide-to-the-fourier-transform/

# Maxwell’s Equations Site

There is a good site that gives lots of detail about this subject.

The site is here: http://www.maxwells-equations.com/index.php#maxwells

It’s clickable to all the symbol explanations.

I wanted to request permission to post this, but I couldn’t find an email address on the website.

# SIGNALS, EXCITATION, and RESPONSE

I’ve updated my RC Response document (See the Math Documents link from the main menu). I added a section that explains why time shifting involve subtracting rather than adding slices of time.

Here’s another page that goes into even more detail.