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Math.tan

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

Syntax

Math.tan(x)

Parameters

x
A number representing an angle in radians.

Return value

The tangent of the given number.

Description

The Math.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 (Math is not a constructor).

Examples

Using Math.tan()

Math.tan(1); // 1.5574077246549023

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 compatibilityUpdate compatibility data on GitHub

Desktop
Chrome Edge Firefox Internet Explorer Opera Safari
tan 1 12 1 3 3 1
Mobile
Android webview Chrome for Android Firefox for Android Opera for Android Safari on iOS Samsung Internet
tan 1 18 4 10.1 1 1.0
Server
Node.js
tan 0.1.100

See also

© 2005–2018 Mozilla Developer Network and individual contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://wiki.developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/tan