The ACOS function is one of the math and trigonometry functions. It is used to return the arccosine of a number.
The ACOS function syntax is:
where x is the cosine of the angle you wish to find, a numeric value greater than or equal to -1 but less than or equal to 1 entered manually or included into the cell you make reference to.
To apply the ACOS function,
- select the cell where you wish to display the result,
- click the Insert Function icon situated at the top toolbar,
or right-click within a selected cell and select the Insert Function option from the menu,
or click the icon situated at the formula bar,
- select the Math and trigonometry function group from the list,
- click the ACOS function,
- enter the required argument,
- press the Enter button.
The result will be displayed in the selected cell.
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