Euler’s Identity

In mathematics, Euler’s identity is the equality

e^{i \pi} + 1 = 0.

Explanation

Euler’s identity is a special case of Euler’s formula from complex analysis, which states that for any real number $x$ ,

e^{ix} = \cos x + i \sin x.

\begin{equation} a^2+b^2=c^2 \end{equation}

\begin{equation} \begin{pmatrix} A & B \\ B & C \end{pmatrix} \end{equation}