JavaScript Math.asin() Method

　JavaScript Math Object

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

If the value of the passed parameter is-1to1outside the range, the method will return NaN.

Because asin() is a static method of Math, you always use it asMath.asin(), rather than used as a method of creating a Math object.

Syntax:

Math.asin(x)

Math.asin(0.)9);

Browser Compatibility

All browsers fully support the Math.asin() method:

Parameter Value

Technical Details

More examples

For less than-1or greater1The value, Math.asin() returns NaN:

Math.asin(-2);　　　//　NaN
Math.asin(-1);　　　//　-1.5707963267948966　(-pi/2)
Math.asin(0.);//　0
Math.asin(0.)5);　　//　0.5235987755982989
Math.asin(1);//　1.5707963267948966　(pi/2)
Math.asin(2);//　NaN

　JavaScript Math Object