docs: update math API docs

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2026-03-20 02:35:15 +08:00
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# Matrix3::RotationZ
```cpp
static Matrix3 RotationZ(float radians)
```
返回绕 Z 轴旋转的 3x3 旋转矩阵。
**参数:**
- `radians` - 旋转角度(弧度)
**返回:** `Matrix3` - 绕 Z 轴旋转的矩阵
**复杂度:** O(1)
**示例:**
```cpp
Matrix3 rotZ = Matrix3::RotationZ(Math::Radians(45.0f));
// 结果(绕 Z 轴旋转 45 度):
// [ 0.707 -0.707 0]
// [ 0.707 0.707 0]
// [ 0 0 1]
```