This document provides a mnemonic to remember the definitions of sine, cosine, and tangent in right triangles. Sine is defined as the ratio of the opposite side to the hypotenuse, cosine as the ratio of the adjacent side to the hypotenuse, and tangent as the ratio of the opposite side to the adjacent side.

1. *A trick to remember
how to find Sine,
Cosine, and Tangent
(SOH) •sin( ) = Opposite for right triangles*
Hypotenuse
(CAH) •cos( ) = Adjacent
Hypotenuse
(TOA) •tan( ) = Opposite
Adjacent