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ATAN

Returns the arc tangent of an expression that represents a numerical value. The range of ATAN is [-/2,/2] (that is, /2 < ATAN(x) < /2).

Format

ATAN(x)

Argument

 

x	Any valid expression that evaluates to a real number.

Example

The following example illustrates the use of the ATAN function. The location of marker_1 and marker_2 is shown in the figure below.

 

Function	ATAN(DX(marker_2, marker_1, marker_2) / DY(marker_2, marker_1, marker_2))
Returns	45

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