Returns the arctangent, in radians, of a number.

Syntax

ATn ( numExpr )

Elements

numExpr

Any numeric expression.

ATn returns the angle, in radians, whose tangent is equal to the value of numExpr.

The range of the return value is -pi/2 (-90 degrees) to pi/2 (90 degrees), exclusive.

The data type of the return value is Double.

Language cross-reference

@ATan function in formula language

Example
See Also

LotusScript Language Reference: A through D
Constants
ACos function
ASin function
ATn2 function
Cos function
Sin function
Tan function

Glossary