# IMTAN

The IMTAN function returns the inverse tangent of a complex number in the form x + yi. This function is useful when working with complex numbers in Excel.

## Syntax

=IMTAN(`inumber`

)

`inumber` | The complex number for which you want to find the inverse tangent. |

## About IMTAN

When dealing with complex numbers and needing to compute the inverse tangent, Excel's IMTAN function comes to the rescue. It aids in determining the angle (in radians) corresponding to a complex number expressed in the form x + yi, where x represents the real part and y represents the imaginary part of the complex number. This function is particularly handy for tasks involving complex arithmetic and trigonometry in Excel worksheets. By inputting the desired complex number as the argument, you can swiftly obtain the inverse tangent value, thus facilitating intricate calculations involving complex quantities. The IMTAN function is a valuable asset in Excel's toolset for handling complex number operations with ease and accuracy.

## Examples

If you have a complex number 3 + 4i and want to find its inverse tangent, you would use the formula: =IMTAN("3+4i")

For a complex number -2 - i, to calculate its inverse tangent, you can use: =IMTAN("-2-i")

## Questions

**What format should the complex number be in for the IMTAN function?**

The complex number should be in the format x + yi, where x and y are real numbers and i represents the imaginary unit. Ensure the input follows this standard notation for accurate results.

**What unit does the IMTAN function return the inverse tangent result in?**

The IMTAN function returns the result in radians. If you need the result in degrees, you can convert it using the RADIANS or DEGREES function in Excel.

**Can the IMTAN function handle complex numbers with only real or imaginary parts?**

Yes, the IMTAN function can handle complex numbers with only real or imaginary parts. For example, if you have a complex number with no imaginary part (pure real number) or no real part (pure imaginary number), you can still use the IMTAN function to find the inverse tangent.

## Related functions

IMCOS

IMSIN

IMEXP

IMPRODUCT

IMREAL

IMAGINARY