diff --git a/README.md b/README.md
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@@ -374,6 +374,7 @@ Creative coding is a different discipline than programming systems in which the
 - [Mathematical Symbols](http://www.rapidtables.com/math/symbols/Basic_Math_Symbols.htm) - List of all mathematical symbols and signs.
 - [The magnificent 2d matrix](http://ncase.me/matrix/) - Interactive tool to better understand transformation matrices.
 - [Game Dev Movement cheatsheet with examples](http://www.somethinghitme.com/2013/11/13/snippets-i-always-forget-movement/) - JavaScript math snippets for movement.
+- [Maths & trigonometry cheat sheet for 2D & 3D games](https://gist.github.com/xem/99930986c5333125a13b0ea50600391f) - Maths cheat-sheet for 2D and 3D game-makers.
 
 ## Machine learning • Computer Vision • Ai