Java Math asin() Method

The asin() method of Math class computes the trigonometric Arc Sine (inverse of sine ) of an angle. The value returned is between -pi/2 to pi/2.

Syntax:

public static double asin(double a)

Parameters:

The parameter ‘a’ represents the value whose arc sine is to be determined.

Return Value:

The asin() method returns the arc sine of the argument .

• It returns NaN, if we pass a NaN or absolute argument greater than 1.
• If we pass zero as an argument, it will return zero with the same sign as the argument.

Example 1:

public class JavaMathAsinExample1 {
    public static void main(String[] args) {
        double a=1/2;
        //return the arc sine value for a
        System.out.println("Arc sin value : "+Math.asin(a));
    }
}

Output:

Arc sin value : 0.0

Example 2:

public class JavaMathAsinExample2 {
    public static void main(String[] args) {
        //return the arc sine value for Double.MIN_VALUE
        double a=Double.MIN_VALUE;
        System.out.println("Arc sine value for "+a+" = "+Math.asin(a));
    }
}

Output:

Arc sine value for 4.9E-324 = 4.9E-324

Example 3:

public class JavaMathAsinExample3 {
    public static void main(String[] args) {
       // Math.PI value is 3.414 that is greater than 1
        double x = Math.PI;
        System.out.println("Arc sine value for "+x+" = "+Math.asin(x));
    }
}

Output:

Arc sine value for 3.141592653589793 = NaN

Example 4:

public class JavaMathAsinExample4 {
    public static void main(String[] args) {
        double x= 7.0987;
        double y= Math.toRadians(x);
        System.out.println(Math.asin(y));
    }
}

Output:

0.1242148667016853