A to Z of Excel Functions: The SIN Function
7 July 2025
Welcome back to our regular A to Z of Excel Functions blog. Today we look at the SIN function.
The SIN function
Are you living in SIN? This function returns the sine of the given angle. For those of you with more important things to do during your trigonometry lessons (like plotting ways to skip the subject), that denotes the ratio of the opposite side of a triangle divided by its hypotenuse (subject to sign considerations), viz.
The SIN function employs the following syntax to operate:
SIN(number)
The SIN function has the following arguments:
- number: this is required and represents the angle in radians for which you want the sine.
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:
We’ll continue our A to Z of Excel Functions soon. Keep checking back – there’s a new blog post every other business day.
A full page of the function articles can be found here.
