Atn(Num)
Returns the arctangent of a number.
The result is expressed in radians.
See also: Cos, Sin, Tan
Example:
Sub AtnExample
Dim Msg, Pi ' Declare variables
Pi = 4 * Atn(1) ' Calculate Pi
Msg = "Pi = " & Str(Pi)
MsgBox Msg ' Result: "Pi = 3.1415..."
End Sub