diff --git a/education/math/MATH1210 (calc 1)/Derivatives.md b/education/math/MATH1210 (calc 1)/Derivatives.md
index bce636f..337ef48 100644
--- a/education/math/MATH1210 (calc 1)/Derivatives.md	
+++ b/education/math/MATH1210 (calc 1)/Derivatives.md	
@@ -108,6 +108,9 @@ $$ \dfrac{d}{dx} e^x = e^x $$
 $$ \dfrac{d}{dx}a^x = a^x*(\ln(a)) $$
 for all $a > 0$
 
+# Chain Rule
+$$ \dfrac{d}{dx} f(g(x)) = f'(g(x))*g'(x) $$
+
 # Trig Functions
 $$ \lim_{x \to 0} \dfrac{\sin x}{x} = 1 $$
 $$ \lim_{x \to 0} \dfrac{\cos x - 1}{x} = 0 $$