Java Math.tanh() Method

Java Math.tanh() method returns hyperbolic tangent of the given value. This method accepts double type value as an argument and returns the hyperbolic tangent of this value as a result. Hyperbolic tangent of a value x is defined as (e^x – e^-x)/(e^x + e^-x), where e is the Euler’s number whose value is 2.718281828459045.

public class JavaExample
{
  public static void main(String[] args)
  {
    double x = 30;
    System.out.println(Math.tanh(x));
  }
}

Output:

1.0

Syntax of Math.tanh() method

Math.tanh(90); //returns 1.0

tanh() Description

public static double tanh(double x): Returns the hyperbolic tangent of the given value (argument) x.

tanh() Parameters

• x: A double value whose hyperbolic tangent is to be determined.

tanh() Return Value

• Returns hyperbolic tangent of argument x.
• If the argument x is NaN (Not a number), then it returns NaN.
• If the argument x is zero, then it returns the zero with the same sign.
• If the argument x is positive infinity, then it returns +1.0.
• If the argument x is negative infinity, then it returns -1.0.

Example 1

public class JavaExample
{
  public static void main(String[] args)
  {
    double x1 = 1.0;
    double x2 = 0;
    double x3 = -1.0;
    //hyperbolic tangent of different double values.
    System.out.println(Math.tanh(x1));
    System.out.println(Math.tanh(x2));
    System.out.println(Math.tanh(x3));
  }
}

Output: