# IMCOSH function: Description, Usage, Syntax, Examples and Explanation

## What is IMCOSH function in Excel?

IMCOSH function is one of Engineering functions in Microsoft Excel that returns the hyperbolic cosine of a complex number in x+yi or x+yj text format.

## Syntax of IMCOSH function

IMCOSH(inumber)

The IMCOSH function syntax has the following arguments.

**Inumber:**A complex number for which you want the hyperbolic cosine.

## IMCOSH formula explanation

- Use COMPLEX to convert real and imaginary coefficients into a complex number.
- If inumber is a value that is not in the x+yi or x+yj text format, IMCOSH returns the #NUM! error value.
- If inumber is a logical value, IMCOSH returns the #VALUE! error value.

## Example of IMCOSH function

Steps to follow:

1. Open a new Excel worksheet.

2. Copy data in the following table below and paste it in cell A1

Note: For formulas to show results, select them, press F2 key on your keyboard and then press Enter.

You can adjust the column widths to see all the data, if need be.

Formula |
Description |
Result |

=IMCOSH(“4+3i”) | Returns the hyperbolic cosine of a complex number, 4+3i. | -27.0349456030742+3.85115333481178i |