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A fun example of Euler’s formula is to let theta = pi, giving (noting cos pi = -1 and sin pi = 0, and doing a a little rearranging):

e^(i pi) + 1 = 0

where the carat indicates an exponential.

Here you have a simple formula using all five, and only the five, most important numbers: e, i, 1, 0, and pi

Some philistines would add phi – the golden ratio – to this list, but they are generally communists and cannot be trusted.

(You can hunt through this post to your heart’s content and you will not find any hidden pearls of investing wisdom.)


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