[Term Entry] C# Math-functions: Asinh()

content/c-sharp/concepts/math-functions/terms/asinh/asinh.md

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+---
+Title: 'Asinh()'
+Description: 'Returns the inverse hyperbolic sine of a number, in radians.'
+Subjects:
+  - 'Code Foundations'
+  - 'Computer Science'
+Tags:
+  - 'Arithmetic'
+  - 'Method'
+  - 'Numbers'
+CatalogContent:
+  - 'learn-c-sharp'
+  - 'paths/computer-science'
+---
+
+The **`Math.Asinh()`** method returns the inverse hyperbolic sine of a number, in radians. This method appears frequently in advanced mathematics, including physics, geometry, machine learning, and numerical analysis.
+
+> **Note:** The static method `Math.Asinh()` was introduced in .NET Core 2.1.
+
+## Syntax
+
+```pseudo
+Math.Asinh(double value);
+```
+
+**Parameters:**
+
+- `value`: A real number. If value is `NaN`, the method returns `NaN`.
+
+**Return value:**
+
+The inverse hyperbolic sine of `value`, in radians.
+
+## Example
+
+The following example demonstrates the `Math.Asinh()` method and writes the result to the console:
+
+```cs
+using System;
+class Program
+{
+  static void Main()
+  {
+    double x = 2;
+    double result = Math.Asinh(x);
+    Console.WriteLine(result);
+  }
+}
+```
+
+The example will result in the following output:
+
+```shell
+1.4436354751788103
+```
+
+## Codebyte Example
+
+The following codebyte example uses the `Math.PI` constant field to convert the result to degrees:
+
+```codebyte/csharp
+using System;
+class Program
+{
+  static void Main()
+  {
+    double x = 4;
+    double radians = Math.Asinh(x);
+    double degrees = radians * (180 / Math.PI);
+
+    Console.WriteLine($"Radians: {radians}");
+    Console.WriteLine($"Degrees: {degrees}");
+  }
+}
+```