WPS Features
Resources
Free AI Tools
Docs Center

How to Use

Last updated:July 8, 2026

Use ACOS with 3 how-to topics, including inserting it from the Insert Function dialog, typing the formula directly in a cell, and reviewing syntax and parameter guidance.

How-to Index

No.TopicMembership Requirement
11. Insert ACOS from the Insert Function dialogFree
22. Type the formula directly in a cellFree
33. Review syntax and parameter guidanceFree

How-to Guide

1. Insert ACOS from the Insert Function dialog

Entry: Formula tab → Insert Function

  1. Select the cell where you want to enter the formula.
  2. Click the fx button in the formula bar, or click Insert Function on the Formula tab.
  3. Search for ACOS in the Insert Function dialog.
  4. Select the function and click OK.
  5. Enter the required parameter in the Function Arguments dialog.
  6. Click OK to finish inserting the function.

Success Criteria

  • The selected cell contains an ACOS formula.
  • The formula returns a calculation result after the parameter is entered.
  • The formula can be edited or copied to other cells.

Tips While Using

  • Enter a numeric value as the parameter.
  • Keep the parentheses and separators in the correct format.

2. Type the formula directly in a cell

Entry: Worksheet cell or formula bar

  1. Select the cell where you want to enter the formula.
  2. Type =ACOS(...) directly in the cell or the formula bar.
  3. Press Enter to confirm the formula.
  4. If you want to review parameter guidance, type =ACOS( and press F1 to open syntax help.

Success Criteria

  • The cell shows the ACOS calculation result.
  • The full formula remains visible in the formula bar.
  • The formula can be filled down or copied to other cells.

Tips While Using

  • Use a valid numeric input range for the parameter.
  • Before copying the formula, check whether relative or absolute references are needed.

3. Review syntax and parameter guidance

Entry: Formula tab → Insert Function

  1. Click Insert Function on the Formula tab.
  2. Enter ACOS in the search box.
  3. Select the function and review the syntax: ACOS(number).
  4. Click the help link for the function to view more details.

Success Criteria

  • The ACOS function name and syntax are visible.
  • The parameter format number is confirmed.
  • You can return to the worksheet and continue entering the formula.

Tips While Using

  • Review the syntax before batch entry to reduce formula errors.
  • If you need degree output, continue with an angle conversion function afterward.