File:Euler's equation.pdf

One of Euler's many equations: e^ix = cos x + i sin x. Here are several reasons for believing it. A consequence is e^(i pi) + 1 = 0, an equation relating the 5 most important numbers in the world. If you feel that other are unfairly omitted, feel free to include them: e.g., e^(i pi) + 1 = 0(2)(17)(phi)(gamma).