Atn (rad )
Returns the arc tangent of a number
The argument rad can be any numeric expression. The result is expressed in radians
Related Topics: Cos, Tan, Sin
Example:
Sub AtnExample ()
Dim Msg, Pi ' Declare variables.
Pi = 4 * Atn(1) ' Calculate Pi.
Msg = "Pi is equal to " & Str(Pi)
MsgBox Msg ' Display results.
End Sub