Atan
Purpose 
Returns the trigonometric arc tangent (Atan), or inverse tangent, of 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.
Examples 
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
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