# RotateX(float)

> Returns a float3x3 matrix that rotates around the x-axis by a given number of radians.

## Definition

* **Type:** Method
* **Namespace:** [Unity.Mathematics](/engine/6000.5/script-reference/unity/mathematics.md)
* **Assembly:** UnityEngine.MathematicsModule

```csharp
public static float3x3 RotateX(float angle)
```

### Parameters

**** (\[float]\(https\://learn.microsoft.com/dotnet/api/system.single)): The clockwise rotation angle when looking along the x-axis towards the origin in radians.

### Returns

| Type                                                                      | Description                                                             |
| ------------------------------------------------------------------------- | ----------------------------------------------------------------------- |
| [float3x3](/engine/6000.5/script-reference/unity/mathematics/float3x3.md) | The float3x3 rotation matrix representing a rotation around the x-axis. |