# ACOS

ACOS(`number`, `radians`)

Returns the arc cosine of a `number`. Default produces result in radians.

### Arguments <a href="#arguments" id="arguments"></a>

| Argument  | Description                                                                      |
| --------- | -------------------------------------------------------------------------------- |
| `number`  | Number to take arc cosine of.                                                    |
| `radians` | True to produce output in radians (default), false to produce output in degrees. |

### Output <a href="#output" id="output"></a>

The arc cosine of a `number`.

### Example <a href="#examples" id="examples"></a>

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