Atn2 (Tag-based PE function)

Return the inverse tangent (arctan) of a tangent value a/b. The inverse tangent is the angle measured in radians from the positive x-axis to a line whose endpoints are the origin and the Cartesian coordinates (b, a).

Syntax

Atn2(x, y)

Arguments

x

An integer or real number

y

A non-zero integer or real number

Returns

The inverse tangent in radians of the tangent value x/y.

Exceptions

Returns an error if x or y is not an integer or real number.

Example

Atn2(1,2) [Returns 0.46365]

Atn2('att1', 'att2')

Atn2(TagVal('att1','y'), TagVal('att2', 'y'))