How to Use

There are 3 how-to topics in this guide, with 3 available without membership and 0 membership-related items; choose a topic from the index and follow the entry path and steps.

How-to Index

How-to Guide

1. Enter ATAN from the Insert Function dialog

Entry path: Formulas 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 Formulas tab.
3. Search for ATAN in the Insert Function dialog box.
4. Select the function and click OK.
5. Enter the parameter in the Function Arguments dialog box.
6. Click OK to finish entering the function.

Success Criteria

• Interface result: The target cell now contains the ATAN function.
• What you can do next: You can continue editing the parameter or review the calculation result.

Tips While Using

• Make sure the function name is spelled correctly when you search or type it.
• The parameter should be a number or a cell reference that can be evaluated as a number.

2. Type the ATAN formula directly in a cell

Entry path: Cell → Formula bar

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

Success Criteria

• Interface result: The cell returns the ATAN calculation result.
• What you can do next: You can copy the formula to other cells for additional calculations.

Tips While Using

• Use standard English punctuation for formula separators.
• If the referenced content is text, the result may not match the expected numeric output.

3. Check ATAN syntax and parameter details

Entry path: Formulas tab → Insert Function

1. Click Insert Function on the Formulas tab.
2. Type ATAN in the search box.
3. Select the function and review the syntax: ATAN(number).
4. Open the related help entry if you want more details.

Success Criteria

• Interface result: You can see the function name, syntax, and parameter description.
• What you can do next: You can return to the worksheet and enter the formula with the reviewed syntax.

Tips While Using

• number is the numeric value whose arctangent you want to calculate.
• The returned result is an inverse tangent value in radians and can be used in later formulas.