What is the syntax for IMSECH in Excel?

The syntax for IMSECH is: =IMSECH(inumber)

What are common errors with IMSECH?

#VALUE! if not a valid complex number

How do I use the IMSECH function?

To use IMSECH, type =IMSECH( in a cell and provide the required arguments. Excel will show you the syntax and parameter hints as you type. Make sure to close the parentheses and press Enter to execute the function.

Why is IMSECH not working in my Excel?

Common issues with IMSECH include #VALUE! if not a valid complex number. Start by checking the syntax =IMSECH(inumber), then verify each referenced cell or range.

Engineering

IMSECH Function in Excel

Returns the hyperbolic secant of a complex number.

Syntax

=IMSECH(inumber)

Arguments

inumber (required): A complex number in x+yi or x+yj format

Examples

=IMSECH("1+2i") - Hyperbolic secant of 1+2i - Result: -0.413-0.688i

IMSECH in technical sheets

Document units in adjacent cells — many engineering functions require exact unit strings.
Use [CONVERT](/functions/convert/) for unit changes before specialized formulas.
Validate inputs with [ISNUMBER](/functions/isnumber/) and range checks.

Common errors

#VALUE! if not a valid complex number

Use cases

Complex number calculations
Engineering

Frequently asked questions

What is the IMSECH function in Excel? IMSECH returns the hyperbolic secant of a complex number. The syntax is =IMSECH(inumber). Typical use cases include complex number calculations, engineering.
How do I use the IMSECH function? To use IMSECH, type =IMSECH( in a cell and provide the required arguments. Excel will show you the syntax and parameter hints as you type. Make sure to close the parentheses and press Enter to execute the function.
Why is IMSECH not working in my Excel? Common issues with IMSECH include #VALUE! if not a valid complex number. Start by checking the syntax =IMSECH(inumber), then verify each referenced cell or range.

Editorial review

Reviewed by Excel.Directory Editorial Team. Updated May 2026.