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    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 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

    Example: 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

    Specification Status Comment
    ECMAScript 1st Edition. Standard Initial definition. Implemented in JavaScript 1.0.
    ECMAScript 5.1 (ECMA-262)
    The definition of 'Math.tan' in that specification.
    Standard  
    ECMAScript 2015 (6th Edition, ECMA-262)
    The definition of 'Math.tan' in that specification.
    Standard  

    Browser compatibility

    Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
    Basic support (Yes) (Yes) (Yes) (Yes) (Yes)
    Feature Android Chrome for Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
    Basic support (Yes) (Yes) (Yes) (Yes) (Yes) (Yes)

    See also

    Document Tags and Contributors

    Last updated by: Mingun,