ACOS in WPS on Windows FAQ

Last updated:July 20, 2026

When using ACOS, the 3 most common question types are formula errors, input guidance, and unexpected results; this FAQ covers 3 frequent questions.

FAQ

What should I do if the ACOS function shows an error after I enter it?

  1. Check whether the formula starts with =.
  2. Make sure the parentheses are paired correctly and the parameter separator is correct.
  3. Confirm that the input is a calculable numeric value, then press Enter again.

How do I view syntax guidance for the ACOS function?

  1. Select the target cell.
  2. Enter =ACOS(.
  3. Review the syntax guidance and example details shown in the formula input area.

Why does the ACOS result look incorrect?

  1. Check whether the referenced cell contains a number instead of text.
  2. Check for incorrect references or upstream errors in nested formulas.
  3. Edit the parameter and confirm that the result updates when the source data changes.

Glossary

TermDefinition
ACOSAn inverse cosine function that returns the arccosine result for a given value.
Formula barThe area in a spreadsheet where you enter and edit formulas.
Nested calculationA calculation that uses other functions or expressions inside one formula.