Euler's formula

  1. Mathematics. the theorem that eix = cosx + isinx.
  2. Mechanics. a formula for determining the maximum load that can be applied to a given column without causing it to buckle.

Origin of Euler's formula

First recorded in 1945–50; named after L. Euler Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018