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$ATAN(n) Function

This math function will return the ArcTangent of n where n is a number, variable that represents a number, or a math equation that returns a number. The ArcTangent is the angle in radians whose Tangent is equal to n. To calculate the ArcTangent in degrees, use $DEG($ATAN(n)) instead.

Examples:

$ATAN(1) returns 0.78539816
$DEG($ATAN(1)) returns 45