Euler's formula
Americannoun
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Mathematics. the theorem that e ix = cos x + i sin x.
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Mechanics. a formula for determining the maximum load that can be applied to a given column without causing it to buckle.
Etymology
Origin of Euler's formula
First recorded in 1945–50; named after L. Euler
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Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
