Comment on xkcd #2904: Physics vs. Magic

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azulavoir@sh.itjust.works ⁨8⁩ ⁨months⁩ ago

Imagine taking a line and rolling it around a circle so that it’s always touching. Like a wheel on a flat surface, but from the wheel’s perspective.

Sine and cosine are the X and Y coordinates of the intersection point, and tangent is the slope of the line.

You can also relate it back to acoustics!

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