Function degToRad

degToRad(degrees: number): number
Convert degrees to radians

将角度转换为弧度
Parameters
- degrees: number
  The angle in degrees. 角度值
Returns number
The angle in radians. 弧度值
Example
```
degToRad(180) // => Math.PI
degToRad(90) // => Math.PI / 2
degToRad(0) // => 0
```
- Defined in src/math/deg-to-rad.ts:18