Common questions about ATAN usually involve parameter types, result interpretation, and filling formulas across cells; this section covers 3 frequent questions.
FAQ
What should I do if ATAN returns an error?
- Check whether the parameter is numeric or whether the referenced cell contains text or extra spaces.
- Confirm that the function name, parentheses, and formula structure are entered correctly.
- Clean the source data if needed, then enter the formula again.
Why does the ATAN result not match the angle I expected?
- Confirm that the returned result is in radians rather than degrees.
- Check whether the input value and cell references are correct.
- If you need degrees, convert the result in a later step.
How can I use ATAN in multiple cells at once?
- Enter the correct ATAN formula in the first target cell.
- Select that cell and drag the fill handle across the target range.
- After filling, check whether relative or absolute references need adjustment.
Glossary
| Term | Definition |
|---|---|
| ATAN | An inverse tangent function that returns the arctangent of a numeric value. |
| Radian | A unit used to express angles and commonly used as the return value in trigonometric functions. |
| Parameter | The input inside a function's parentheses. ATAN requires one numeric parameter. |
| Formula bar | The area above the worksheet where you can enter or edit formulas directly. |
| Fill handle | The small square at the lower-right corner of a selected cell, used to copy formulas across a range. |