diff --git a/education/math/MATH1060 (trig)/Addition and Subtraction.md b/education/math/MATH1060 (trig)/Addition and Subtraction.md
index a3b4ee6..8f70705 100644
--- a/education/math/MATH1060 (trig)/Addition and Subtraction.md	
+++ b/education/math/MATH1060 (trig)/Addition and Subtraction.md	
@@ -2,3 +2,5 @@ Given the formula $\sin(\alpha + \beta)$:
 $$ \sin(\alpha + \beta) = \sin(\alpha)\cos(\beta) + \cos(\alpha)\sin(\beta) $$
 Given the formula $\cos(\alpha + \beta)$:
 $$ \cos(\alpha + \beta) = \cos(\alpha)\cos(\beta) - \sin(\alpha)\sin(\beta) $$
+Given the formula $\tan(\alpha + \beta)$:
+$$\frac{\alpha + \} \dfrac{\tan\alpha + \tan\beta}{1 - \tan\alpha\tan\beta} $$
\ No newline at end of file