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 version 

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)

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