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==Description==
==Description==
*This function is the inverse function of COS in trigonometry.
* The value of ACOS(Number) in radians in the range 0 to pi().
* The value of ACOS(Number) in radians in the range 0 to pi().
*Calci returns the value of arccosine (inverse cosine) in Radians.
*Calci returns the value of arccosine (inverse cosine) in Radians.
For example, ACOS(0.5,(-0.2),1) gives the arcCOS or inverseCOS values for each element.
For example, ACOS(0.5,(-0.2),1) gives the arcCOS or inverseCOS values for each element.
*Consider '''x = 0.8''' then '''=ACOS(0.8)''' gives '''0.64350110879''' <br/>
*Consider '''x = 0.8''' then '''=ACOS(0.8)''' gives '''0.64350110879''' <br/>
*Also it is called as Cyclometric function.
*Also it is called as Cyclometric function.
*ACOS is described as arcCOS of a given number and denoted by <math>cos^{-1}(x)</math>.
*ACOS is described as arcCOS of a given number and denoted by <math>cos^{-1}(x)</math>.