JavaScript: The Definitive Guide

24.104. Math.atan( ): compute an arctangent

ECMAScript v1

24.104.1. Synopsis

Math.atan(x)

24.104.1.1. Arguments

x

Any number.

24.104.1.2. Returns

The arc tangent of the specified value x. This return value is between -π/2 and π/2 radians.