ATAN(X)

 

Description

This function returns the two-quadrant arc tangent of angle X.  The result is the angle (in radians) between -PI/2 to +PI/2 whose tangent is X.  To convert radians to degrees, use the DEGREES function.

 

Parameters

 

X

A numeric value expressed in radians.

 

Examples

 

ATAN(.5) = 0.463647609

 

ATAN(J44) = -0.785398163

Where J44 = -1.

 

DEGREES(ATAN(U6)) = 87.70939

Where U6 = 25.