## How do you use ATAN in Google Sheets?

The ATAN function in Google Sheets calculates the arctangent of a number. This function can be used to determine the angle of a line in a coordinate plane, or to find the angle between two lines. The ATAN function takes one input, the number you want to calculate the arctangent of.

## What is the syntax of ATAN in Google Sheets?

The syntax of ATAN in Google Sheets is "=ATAN(number)". This function takes a number as an input and calculates the inverse tangent of that number.

## What is an example of how to use ATAN in Google Sheets?

The Google Sheets ATAN function can be used to calculate the arctangent of a given number. The function takes two input parameters: the value to be arctan-ed, and the number of radians to include in the calculation. The arctangent of a number is the angle (in radians) that is tangent to the line that passes through the given number and the origin of the coordinate system.

For example, if I wanted to find the angle (in radians) between the line y = 2 and the line y = -3, I could use the ATAN function in Google Sheets as follows:

=ATAN(2, -3)

This would return a value of 1.5708.

## When should you not use ATAN in Google Sheets?

There are a few occasions when you should not use the ATAN function in Google Sheets. First, if you are trying to find the arctangent of a negative number, the ATAN function will return an error. Second, if you are trying to find the arctangent of a number that is greater than or equal to 1, the ATAN function will return a value of pi/2. Finally, if you are trying to find the arctangent of a number that is less than -1, the ATAN function will return a value of -pi/2.

## What are some similar formulae to ATAN in Google Sheets?

ATAN is short for the arctangent function, which takes a number and calculates the angle it creates when drawn from the origin to that number on a coordinate plane. There are a few similar formulae in Google Sheets that can calculate angles, including the TAN function, which calculates the tangent of an angle, and the SIN and COS functions, which calculate the sine and cosine of an angle, respectively. All of these functions can be used to calculate the angles between two points on a coordinate plane, which can be helpful for creating graphs or plotting data.