Formula Engine Reference Guide
 

 

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ATAN(X)

Description
This function returns the 2-quadrant arc tangent of angle X. The result is the angle (in radians) whose tangent is X and ranges from -PI/2 to +PI/2 . 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