French mathematician Abraham de Moivre was born #OTD in 1667.
He is best known for de Moivre's theorem, which links complex numbers and trigonometry, and for his work in the development of analytic geometry and the theory of equations. He published "The Doctrine of Chances" (1718) where he developed a formula for the normal approximation to the binomial distribution, now known as the de Moivre-Laplace theorem.
https://en.wikipedia.org/wiki/De_Moivre%27s_formula
https://en.wikipedia.org/wiki/De_Moivre%E2%80%93Laplace_theorem