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.

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// 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));     } }

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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.

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// 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);     } }

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Output :

NaN
NaN
NaN

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