Java Math.tanh() method

The java.lang.Math.tanh() is used to return the hyperbolic tangent of a value. The hyperbolic tangent of any value x can be defined as ((e^x - e ^-x)/2) / ((e^x + e ^-x)/2), where e is an Euler's number. We can say that tanh(a) = sinh(a)/cosh(a).

Syntax

Parameter

Return

If the argument is positive or negative number, this method will return hyperbolic tangent value.
If the argument is Zero, this method will return zero with the same sign as the argument.
If the argument is NaN, this method will return NaN.
If the argument is Positive Infinity, this method will return +1.0.

If the argument is Negative Infinity, this method will return -1.0.

Example 1

public class TanhExample1 { public static void main(String[] args) { double a = 12.0; System.out.println(Math.tanh(a)); } }
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Output:

0.9999999999244973

Example 2

public class TanhExample2 { public static void main(String[] args) { double a = 60.0; System.out.println(Math.tanh(a)); } }
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Output:

1.0

Example 3

public class TanhExample3 { public static void main(String[] args) { double a = -0.0; // Input negative zero, Output negative zero System.out.println(Math.tanh(a)); } }
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Output:

-0.0

Example 4

public class TanhExample4 { public static void main(String[] args) { double a = 0.0/0; // Input NaN, Output NaN System.out.println(Math.tanh(a)); } }
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Output:

NaN

Example 5

public class TanhExample5 { public static void main(String[] args) { double a = -1.0/0; // Input negative infinity, Output negative 1 System.out.println(Math.tanh(a)); } }
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Output:

-1.0

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