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

2 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 COS.*

* *

*The
COS function*

Not to be confused with cos lettuce, this function
returns the *cosine* of the given
angle. For those of you with more
important things to do during your trigonometry lessons (like sleeping), that
denotes the ratio of the adjacent side of a triangle divided by its hypotenuse
(subject to sign considerations), *viz.*

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

**COS(number)**

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

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

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.

Please see my example below:

*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**.*