Atan2
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Function Description
Returns the arctangent, or inverse tangent,  , of
the specified x- and y-coordinates. The arctangent is the angle from the x-axis
to a line containing the origin (0, 0) and a point with coordinates
, of
the specified x- and y-coordinates. The arctangent is the angle from the x-axis
to a line containing the origin (0, 0) and a point with coordinates  ,
Differs from MnAtan as the
latter returns an answer between
,
Differs from MnAtan as the
latter returns an answer between  and
 and
 so
does not differentiate between
 so
does not differentiate between  and
 and
 .
.
 
Note: the ordering of the input variables (first parameter:  , second parameter:
, second parameter:  ) is as per the ATAN2
function in Excel but the ATAN2 function in .NET has the parameter order
reversed.
) is as per the ATAN2
function in Excel but the ATAN2 function in .NET has the parameter order
reversed. 
 
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