Today is international Pi day (3/14 in the American way of writing dates).
I’ve always been fascinated with Pi. It’s not only the tastiest sounding mathematical constant, it also always pops up when you least expect it.
Everyone learns in school that the circumference of a circle is pi*d but it springs up in many other places aswell. When I was studying electronics I learned that the reactance of a capacitor was 1/(2*pi*f*C) and of course who could forget that simply multipling a frequency in Hertz by 2*pi gives the dimensionless measure of angular displacement, the radian.
I also found out that if you measure the diameter of an elephants foot and multiply it by 2*pi, you get the elephants height, but this was not in electronics class…
Anyone got a good pi equation?
