C# Math - Cosh() Method

The C# Cosh() method returns hyperbolic cosine of a value. The hyperbolic cosine of x is defined as:

where e is an Euler's number.

In special cases it returns the following:

• If the argument is NaN, the method returns NaN.
• If the argument is positive infinity or negative infinity, the method returns positive infinity.

Syntax

```public static double Cosh(double arg);
```

Parameters

 `arg` Specify the value.

Return Value

Returns the hyperbolic cosine of a value.

Example:

In the example below, Cosh() method is used to find out the hyperbolic cosine of a value.

```using System;

class MyProgram {
static void Main(string[] args) {
Console.WriteLine("Math.Cosh(-2) = "
+ Math.Cosh(-2));
Console.WriteLine("Math.Cosh(-1) = "
+ Math.Cosh(-1));
Console.WriteLine("Math.Cosh(0) = "
+ Math.Cosh(0));
Console.WriteLine("Math.Cosh(1) = "
+ Math.Cosh(1));
Console.WriteLine("Math.Cosh(2) = "
+ Math.Cosh(2));
Console.WriteLine("Math.Cosh(Double.NaN) = "
+ Math.Cosh(Double.NaN));
Console.WriteLine("Math.Cosh(Double.NegativeInfinity) = "
+ Math.Cosh(Double.NegativeInfinity));
Console.WriteLine("Math.Cosh(Double.PositiveInfinity) = "
+ Math.Cosh(Double.PositiveInfinity));
}
}
```

The output of the above code will be:

```Math.Cosh(-2) = 3.76219569108363
Math.Cosh(-1) = 1.54308063481524
Math.Cosh(0) = 1
Math.Cosh(1) = 1.54308063481524
Math.Cosh(2) = 3.76219569108363
Math.Cosh(Double.NaN) = NaN
Math.Cosh(Double.NegativeInfinity) = Infinity
Math.Cosh(Double.PositiveInfinity) = Infinity
```

❮ C# Math Methods

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