Java.lang.Math.tan() Method

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Description

The java.lang.Math.tan(double a) returns the trigonometric tangent of an angle. Special cases −

• If the argument is NaN or an infinity, then the result is NaN.

• If the argument is zero, then the result is a zero with the same sign as the argument.

The computed result must be within 1 ulp of the exact result. Results must be semi-monotonic.

Declaration

Following is the declaration for java.lang.Math.tan() method

public static double tan(double a)

Parameters

a − an angle, in radians.

Return Value

This method returns the tangent of the argument.

Exception

NA

Example

The following example shows the usage of lang.Math.tan() method.

package com.tutorialspoint;

import java.lang.*;

public class MathDemo {

   public static void main(String[] args) {

      // get two double numbers numbers
      double x = 45;
      double y = -180;

      // convert them in radians
      x = Math.toRadians(x);
      y = Math.toRadians(y);

      // print the tangent of these doubles
      System.out.println("Math.tan(" + x + ")=" + Math.tan(x));
      System.out.println("Math.tan(" + y + ")=" + Math.tan(y));
   }
}

Let us compile and run the above program, this will produce the following result −

Math.tan(0.7853981633974483)=0.9999999999999999
Math.tan(-3.141592653589793)=1.2246467991473532E-16