Syntax: ATAN(X)
X = a numeric value expressed in radians.
ATAN returns the 2-quadrant arc tangent of angle X. The
result is the angle (in radians) whose tangent is X and
ranges from to
. To convert radians to degrees,
use the DEGREES function.
Examples:
ATAN(.5) = 0.463647609
ATAN(J44) = -0.785398163, where J44 = -1
DEGREES(ATAN(U6)) = 87.70939, where U6 = 25
Excel function: ATAN