# cos proc

Source: https://ref.dm-lang.org/proc/cos

### Format
> `cos(X)`

### Returns
> The cosine of X, where X is in degrees.

```dm /cos/
mob/verb/test()
   usr << cos(0)  // 1
   usr << cos(45) // 0.707...
   usr << cos(90) // 0
```

### See also
- [arccos proc](https://ref.dm-lang.org/proc/arccos.md)
- [sin proc](https://ref.dm-lang.org/proc/sin.md)
- [tan proc](https://ref.dm-lang.org/proc/tan.md)
- [turn proc](https://ref.dm-lang.org/proc/turn/index.md)