Java Math tan() Method

---

---

Description

The Java 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: Getting tangent value for a positive double value

The following example shows the usage of Math tan() method to get a tangent value for a positive double value.

package com.tutorialspoint;
public class MathDemo {
   public static void main(String[] args) {

      // get a double number
      double x = 45.0;

      // convert it to radian
      x = Math.toRadians(x);

      // print the tangent for this double
      System.out.println("Math.tan(" + x + ")=" + Math.tan(x));
   }
}

Output

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

Math.tan(0.7853981633974483)=0.9999999999999999

Example: Getting tangent value for a Negative double value

The following example shows the usage of Math tan() method to get a tangent of a negative double value.

package com.tutorialspoint;
public class MathDemo {
   public static void main(String[] args) {

      // get a double number
      double x = -45.0;

      // convert it to radian
      x = Math.toRadians(x);

      // print the tangent for this double
      System.out.println("Math.tan(" + x + ")=" + Math.tan(x));
   }
}

Output

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

Math.tan(-0.7853981633974483)=-0.9999999999999999

Example: Getting tangent value for a zero double value

The following example shows the usage of Math tan() method to get a value of a zero double values.

package com.tutorialspoint;
public class MathDemo {
   public static void main(String[] args) {

      // get a double number
      double x = 0.0;

      // convert it to radian
      x = Math.toRadians(x);

      // print the hyperbolic tangent for this double
      System.out.println("Math.tan(" + x + ")=" + Math.tan(x));
   }
}

Output

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

Math.tan(0.0)=0.0