Java Math tan() method with Examples

The java.lang.Math.tan() returns the trigonometric tangent of an angle.

• If the argument is NaN or an infinity, then the result returned is NaN.
• If the argument is zero, then the result is a zero with the same sign as the argument.

Syntax :

public static double tan(double angle)
Parameters :
The function has one mandatory parameter angle which is in radians. 

Returns :
The function returns the trigonometric tangent of an angle.

Example 1 : To show the working of java.lang.Math.tan() method.

// Java program to demonstrate working
// of java.lang.Math.tan() method
import java.lang.Math;

class Gfg {

    // driver code
    public static void main(String args[])
    {
        double a = 30;

        // converting values to radians
        double b = Math.toRadians(a);

        System.out.println(Math.tan(b));

        a = 45;

        // converting values to radians
        b = Math.toRadians(a);

        System.out.println(Math.tan(b));

        a = 60;

        // converting values to radians
        b = Math.toRadians(a);

        System.out.println(Math.tan(b));

        a = 0;

        // converting values to radians
        b = Math.toRadians(a);

        System.out.println(Math.tan(b));
    }
}

Output :

0.5773502691896257
0.9999999999999999
1.7320508075688767
0.0

Example 2 : To show the working of java.lang.Math.tan() method when an argument is NAN or infinity.

// Java program to demonstrate working
// of java.lang.Math.tan() method infinity case
import java.lang.Math;

public class GFG {
    public static void main(String[] args)
    {

        double positiveInfinity =
               Double.POSITIVE_INFINITY;
        double negativeInfinity =
               Double.NEGATIVE_INFINITY;
        double nan = Double.NaN;
        double result;

        // Here argument is negative infinity,
        // output will be NaN
        result = Math.tan(negativeInfinity);
        System.out.println(result);

        // Here argument is positive infinity,
        // output will also be NaN
        result = Math.tan(positiveInfinity);
        System.out.println(result);

        // Here argument is NaN, output will be NaN
        result = Math.tan(nan);
        System.out.println(result);
    }
}

Output :

NaN
NaN
NaN