# IMTAN

## Content

This function calculates the tangent of specified complex number.

## Syntax

`IMTAN(complex_num)`

## Arguments

The *complex\_num* argument is a complex number to return the tangent for.

## Remarks

An error is returned if the *complex\_num* argument is not in the form "x+yi" or "x+yj".

## Data Types

Accepts numeric and string data. Returns string data.

## Examples

`IMTAN("8+2i")` gives the result -0.0109

`IMTAN("9+3i")` gives the result -0.0037