Math.tan()

Summary

The Math.tan() function returns the tangent of a number.

Syntax

Math.tan(x)

Parameters

x

A number representing an angle in radians.

Description

The tan method returns a numeric value that represents the tangent of the angle.

Because tan is a static method of Math, you always use it as Math.tan(), rather than as a method of a Math object you created.

Examples

Example: Using Math.tan

The following function returns the tangent of the variable x:

function getTan(x) {
   return Math.tan(x);
}

Because the Math.tan() function accepts radians, but it is often easier to work with degrees, the following function accepts a value in degrees, converts it to radians and returns the tangent.

function getTanDeg(deg) {
   var rad = deg * Math.PI/180;
   return Math.tan(rad);
}

Specifications

Browser compatibility