JavaScript Math.asin()

let x = Math.asin(-1);

let x = Math.asin(0);

let x = Math.asin(1);

Description

The Math.asin() method returns the arcsine (in radians) of a number.

The Math.asin() method returns a value between -PI/2 and PI/2.

The Math.asin() method expects a parameter in the range -1 to 1.

Math.asin(-1) returns -PI/2.

Math.asin(0) returns 0.

Math.asin(1) returns PI/2.

Math.asin( x)

Parameter	Description
x	Required. A number.

Type	Description
Number	-PI/2 to PI/2. `NaN` if the parameter is not numeric or outside the range of -1 to 1.

Math.asin() is an ECMAScript1 (ES1) feature.

ES1 (JavaScript 1997) is fully supported in all browsers:


Chrome	Edge	Firefox	Safari	Opera	IE
Yes	Yes	Yes	Yes	Yes	Yes