ACOT function
Inverse cotangent function. ACOT(x) returns the inverse cotangent of x. The inverse cotangent function is the inverse function of the cotangent function and calculates the angle for a given cotangent. The function is defined for all real numbers. The result is an angle expressed in radians in the range (0, ). To convert from radians to degrees, use the DEGREES function.
The argument x can be a real number or a matrix. When it is a matrix, the function returns a matrix with the same dimensions and with the ACOT function applied to all elements.
The inverse cotangent can be expressed in terms of the ATAN function:
$$ \operatorname{acot}(x) = \frac{\pi}{2} - \operatorname{atan}(x) $$
Examples
ACOT(0) equals 1.5707963 (=PI/2)
ACOT(1) equals 0.7853982 (=PI/4)
ACOT(−1) equals 2.3561945 (=3×PI/4)
DEGREES(ACOT(1)) equals 45
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