Last Updated : 12 Jul, 2024
The Math.asin( ) method is used to return the arcsine of a number in radians. The Math.asin() method returns a numeric value between -pi/2 and pi/2 radians. The asin() is a static method of Math, therefore, it is always used as Math.asin(), rather than as a method of a Math object created.
Math.asin(x)=arcsin(x)=unique y where y belongs to [-pi/2;pi/2] such that sin(y)=x
Syntax:
Math.asin(value)
Parameters: This method accepts a single parameter as mentioned above and described below:
Returns: The Math.asin() method returns the arcsine of the given number in radians.
Below is an example of the Math asin( ) Method.
Example 1: In this example, we will return the asin of 1 using the Math asin( ) Method.
JavaScript
console.log("When 1 is passed as a parameter: "
+ Math.asin(1));
Output:
When 1 is passed as a parameter: 1.5707963267948966
Example 2: When -1 is passed as a parameter.
JavaScript
console.log("When -1 is passed as a parameter: "
+ Math.asin(-1));
Output:
When -1 is passed as a parameter: -1.5707963267948966
Example 3: When 2 is passed as a parameter.
JavaScript
console.log("When 2 is passed as a parameter: "
+ Math.asin(2));
Output:
When 2 is passed as a parameter: NaN
Example 4: When 0.5 is passed as a parameter.
JavaScript
console.log("When 0.5 is passed as a parameter: "
+ Math.asin(0.5));
Output:
When 0.5 is passed as a parameter: 0.5235987755982989
We have a complete list of Javascript Math Objects methods, to check those please go through this Javascript Math Object Complete reference article.
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