Changes

<div style="font-size:30px">'''ACOS(x)'''</div><br/>

<div style="font-size:30px">'''ACOS(Number)'''</div><br/>

* Where x is the number and it is varying from -1 to 1.

* <math>Number</math> is any value and it is varying from -1 to 1.

* The value of ACOS(x)  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.

*The number can be a single value or any number of values.

*The number can be a single value or any number of values.