ACOS in WPS on Windows FAQ

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

Check whether the formula starts with = . Check whether the function name, commas, and parentheses are entered correctly. Confirm that the input value can be used in the calculation. Press Enter again after correcting the formula.

Q: How can I view the ACOS function description?

Select any worksheet cell. Type =ACOS( . Review the syntax prompt and parameter hint that appears automatically. Continue the formula based on the displayed guidance.

When using ACOS, the most common questions are about input errors, syntax guidance, and unexpected results. This FAQ includes 3 common answers and a short glossary.

FAQ

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

Check whether the formula starts with =.
Check whether the function name, commas, and parentheses are entered correctly.
Confirm that the input value can be used in the calculation.
Press Enter again after correcting the formula.

How can I view the ACOS function description?

Select any worksheet cell.
Type =ACOS(.
Review the syntax prompt and parameter hint that appears automatically.
Continue the formula based on the displayed guidance.

Why does the ACOS result-look-incorrect?

Check whether the referenced cell contains a valid numeric value.
Check whether the value is stored as text or whether the reference is incorrect.
If you are using a compound formula, review each nested part one by one.
Edit the source value and confirm that the result updates as expected.

Glossary

Term	Definition
ACOS	An inverse cosine function that returns the arccosine of a specified value.
Formula bar	The editing area in a spreadsheet where you can enter, review, and modify formulas.
Cross-worksheet reference	A way to use a cell from another worksheet as an input in the current formula.