# arctan

## Returns the inverse tangent of x.

**Syntax:**

arctan(x);

Argument |
Description |

x |
The angle (in radians) to return the inverse tangent of. |

**Returns:** Real

### Description

Returns the inverse tangent of x. This will accept any number
as, unlike tan, arctans asymptotes are on the y axis so it just
means you'll never get returned a number greater than pi/2 or less
than -pi/2.

**Example:**

val = arctan( 0 );

This will set val to 0.

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