# MathF.Tanh() Method in C# with Examples

Math.Tanh(Single) Method is the inbuilt MathF class method which returns the hyperbolic tangent of a given single value argument.

Syntax: public static float Tanh (float x);
Here, x is the number whose hyperbolic tangent is to be returned and type of this parameter is System.Single.

Return Value: This method returns the hyperbolic tangent of x of type System.Single. If x is equal to NegativeInfinity or PositiveInfinity, PositiveInfinity is returned. If x is equal to NaN, NaN is returned.

Below programs illustrate the use of the above-discussed method:

Example 1:

 `// C# program to illustrate the ` `// MathF.Tanh(Single) Method ` `using` `System; ` ` `  `class` `GFG { ` ` `  `    ``// Main Method ` `    ``public` `static` `void` `Main(String[] args) ` `    ``{ ` ` `  `        ``float` `num1 = 70.0f, num2 = 0.0f, num3 = 1.0f; ` ` `  `        ``// It returns the hyperbolic tangent ` `        ``// of specified angle in radian ` `        ``float` `tanhvalue = MathF.Tanh(num1); ` `        ``Console.WriteLine(``"The Tanh of num1 = "` `+ tanhvalue); ` ` `  `        ``tanhvalue = MathF.Tanh(num2); ` `        ``Console.WriteLine(``"The Tanh of num2 = "` `+ tanhvalue); ` ` `  `        ``tanhvalue = MathF.Tanh(num3); ` `        ``Console.WriteLine(``"The Tanh of num3 = "` `+ tanhvalue); ` `    ``} ` `} `

Output:

```The Tanh of num1 = 1
The Tanh of num2 = 0
The Tanh of num3 = 0.7615942
```

Example 2:

 `// C# praogram to illustrate the ` `// MathF.Tanh(Single) Method ` `using` `System; ` ` `  `class` `GFG { ` ` `  `    ``// Main Method ` `    ``public` `static` `void` `Main() ` `    ``{ ` `         `  `        ``float` `num1 = (90 * (MathF.PI)) / 180; ` `         `  `        ``// calling result() method ` `        ``result(num1); ` `        ``result(Single.NaN); ` `        ``result(Single.NegativeInfinity); ` `        ``result(Single.PositiveInfinity); ` `    ``} ` ` `  `    ``// defining result() method ` `    ``public` `static` `void` `result(``float` `value) ` `    ``{ ` ` `  `        ``// using the method ` `        ``float` `result = MathF.Tanh(value); ` ` `  `        ``// Display the value ` `        ``Console.WriteLine(``"Tanh({0}) will be {1}"``, ` `                                   ``value, result); ` `    ``} ` `} `

Output:

```Tanh(1.570796) will be 0.9171523
Tanh(NaN) will be NaN
Tanh(-Infinity) will be -1
Tanh(Infinity) will be 1
```

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