Reference > Functions reference > Trigonometric functions > Atan
 

Atan

Returns the trigonometric arc tangent (Atan), or inverse tangent, of a number.

Format 

Atan ( number )

Parameters 

number - any numeric expression or field containing a numeric expression

Data type returned 

number

Originated in 

FileMaker Pro 6.0 or earlier

Description 

The arc tangent is the angle, in radians, whose tangent is equal to the specified number.

Example 1 

Atan(1) returns .78539816....

Degrees(Atan(1)) returns 45.

Related topics 

Functions reference (category list)

Functions reference (alphabetical list)

About formulas

About functions

Defining calculation fields

Using operators in formulas