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4 results for “euler”

Formulae (4)

e^{i\theta} = \cos\theta + i\sin\theta

Links complex exponentials to trigonometry.

P_{cr} = \frac{\pi^2 E I}{(K L)^2}

Critical axial load at which a column buckles.

\phi(n) = n\prod_{p|n}\left(1 - \frac{1}{p}\right)

Counts integers up to n coprime to n.

N = 2^{p-1}(2^p - 1)

Euclid-Euler form of even perfect numbers.