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asin()  Math  class method

Description

Returns the arcsine of a number in radians between -PI/2 and PI/2.

  • Radians to Degrees - divide number by (Math.PI / 180).
  • Degrees to Radians - multiply number by (Math.PI * 180).
  • Like all class methods asin() should be used on the class rather than an instance of the class.

Syntax


Signature Description
Math.asin(value)Returns the arcsine of a number in radians between -PI/2 and PI/2.

Parameters


Parameter Description
valueThe value you wish to find the arcsine in radians for:
  • A number in the range -1 to 1.
  • Values outside this range return NaN.

Examples

The code below displays asin() usage.


// Store results in an array.
var asinValues = new Array(5);
asinValues[0] = Math.asin(-1);
asinValues[1] = Math.asin(0);
asinValues[2] = Math.asin(0.75);
asinValues[3] = Math.asin(-2);
asinValues[4] = Math.asin('a string');
asinValues[5] = Math.asin();
alert(asinValues);  

Press the button below to action the above code:

Related Tutorials

JavaScript Advanced Tutorials - Lesson 4 - Math



  

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