# Power Pivot Principles: The A to Z of DAX Functions – COT

16 August 2022

*In
our long-established Power Pivot Principles articles, we continue our series on
the A to Z of Data Analysis eXpression (DAX) functions. This week, we look at COT.*

* *

*The
COT function*

Here’s one to crib for. This function returns the *cotangent* of the given angle. For those of you who don’t find trigonometry
riveting you really shouldn’t be so obtuse, but the cotangent is the inverse of
the tangent function, *i.e. *it
calculates the ratio of the adjacent side of a triangle divided by the opposite
side (subject to sign considerations), *viz.*

The **COT **function
employs the following syntax to operate:

**COT(number)**

The **COT** function has the following arguments:

**number:**this is required and represents the angle in__radians__for which you want the cotangent.

It should be further noted that if the angle
is in degrees, you should multiply the angle by **PI()/180** or else use the **RADIANS** function to convert the angle to radians. Furthermore:

- The absolute value of
**number**must be less than 2^27 and cannot be zero [0] - If
**number**is outside its constraints, an error is returned - If
**number**is a non-numeric value, an error is returned.

Please see my example below:

You might want to sleep on this function…

*Come back next week for our
next post on Power Pivot in the **Blog** section. In the
meantime, please remember we have training in Power Pivot which you can find
out more about **here**. If you wish to catch
up on past articles in the meantime, you can find all of our Past Power Pivot
blogs **here**.*