# ATAN2

## Content

This function calculates the arctangent of the specified x- and y-coordinates.

## Syntax

`ATAN2(x, y)`

## Arguments

This function can take real numbers as arguments.

## Remarks

The arctangent is the angle from the x-axis to a line containing the origin (0, 0) and a point with coordinates ( *x* , y).

The result is given in radians between –PI and PI, excluding –PI. If you want to convert the result to degrees, multiply the result by 180/PI.

## Data Types

Accepts numeric data. Returns numeric data.

## Examples

`ATAN2(A1,E3)`

`ATAN2(R1C1,R3C5)`

`ATAN2(1,1)` gives the result 0.7853981634