IMTAN
Calculates the inverse of the tangent of a number in radians. The resulting angle is returned in radians. This function is most commonly used in engineering calculations that involve angular measurements. How to use
IMTAN
formula?  Examples of using
IMTAN
formula IMTAN
formula not working? Similar formulas to
IMTAN
Usage
Use the IMTAN
formula with the syntax shown below, it has 1 required parameter:
 number (required):
The angle for which the inverse tangent is to be calculated. Must be a real number or a reference to a cell containing a real number.
Examples
Here are a few example use cases that explain how to use theIMTAN
formula in Google Sheets.
Calculate the angle of a right triangle
Given the length of two sides of a right triangle, use IMTAN to calculate the measure of the angle opposite the side of interest. This can be useful in engineering and construction projects.
Calculate bearing angles
In navigation, IMTAN can be used to calculate the bearing angle between two points on a map or chart.
Calculate the slope of terrain
When surveying land for construction, IMTAN can be used to calculate the slope of the terrain, which is important for determining the stability of the land.
Common Mistakes
IMTAN
not working? Here are some common mistakes people make when using the IMTAN
Google Sheets Formula:
Using the wrong form of the complex number
The IMTAN
function requires the complex number to be in rectangular form. If you provide a polar form of the complex number, the function will return an error. Make sure you convert the polar form to rectangular form before using the IMTAN
function.
Forgetting to divide the imaginary part by the real part
To find the inverse tangent of a complex number in rectangular form, you need to divide the imaginary part by the real part. If you forget to do this, the result will be incorrect.
Related Formulas
The following functions are similar to IMTAN
or are often used with it in a formula:

TAN
The
TAN
function returns the tangent of an angle specified in radians. Tangent is the ratio of the length of the opposite side to the length of the adjacent side of a rightangled triangle. This function is commonly used in trigonometry and geometry calculations. 
ATAN
The
ATAN
function returns the arctangent of a value in radians, which is the angle whose tangent is a given value. This function is commonly used in trigonometry and geometry to calculate angles. The returned angle is in the range π/2 to π/2. 
ATAN2
Returns the arctangent of the quotient of its arguments. ATAN2 is similar to ATAN, except that ATAN2 allows for two arguments and returns the angle of the result in the appropriate quadrant. This function is commonly used to calculate the angle between two points in a 2D plane. The angle is measured in radians and ranges from pi to pi.

IMSIN
The IMSIN function returns the sine of a complex number. The function takes a single parameter, which is a complex number in the form of a+bi. The function returns the sine of the complex number. This function is commonly used in engineering and scientific applications for analyzing waves and oscillations.
Learn More
You can learn more about the IMTAN
Google Sheets function on Google Support.