# MS Excel: ATAN2 Function (WS)

This Excel tutorial explains how to use the Excel ATAN2 function with syntax and examples.

## Description

The Microsoft Excel ATAN2 function returns the arctangent (in radians) of (x,y) coordinates.

## Syntax

The syntax for the Microsoft Excel ATAN2 function is:

`ATAN2( x-coordinate, y-coordinate )`

### Parameters or Arguments

x-coordinate is the x-coordinate of a point.

y-coordinate is the y-coordinate of a point.

## Applies To

The ATAN2 function can be used in the following versions of Microsoft Excel:

• Excel 2013, Excel 2011 for Mac, Excel 2010, Excel 2007, Excel 2003, Excel XP, Excel 2000

## Type of Excel Function

The ATAN2 function can be used in Microsoft Excel as the following type of function:

• Worksheet function (WS)

## Example (as Worksheet Function)

Let's look at some Excel ATAN2 function examples and explore how to use the ATAN2 function as a worksheet function in Microsoft Excel: Based on the spreadsheet above, the following Excel ATAN2 examples would return:

```=ATAN2(A1, A2)
Result: 0.674740942

=ATAN2(A2, A3)
Result: -0.643501109

=ATAN2(1, -9)
Result: -1.460139106

=ATAN2(0.2, 0)
Result: 0

=ATAN2(0, 0)
Result: #DIV/0!```

Source: www.tutorialspoint.com

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