diff --git a/Math Poster Complete.tex b/Math Poster Complete.tex
index 2cd47a9..8bb7a2c 100644
--- a/Math Poster Complete.tex	
+++ b/Math Poster Complete.tex	
@@ -276,7 +276,7 @@
 %cannot be used in rotated coordinate frames.  Use only literal coordinates.  
 \end{tikzpicture}
     \\
-    r=\rho sin\theta
+    r=\rho sin\phi
     \\
     x=rcos\theta=\rho cos\theta sin\phi
     \\
@@ -624,4 +624,4 @@
     \\
     a_n=\frac{|r'(t)\times r''(t)|}{|r'(t)|}        &\quad &\text{7, Algebra}
 \end{alignat}
-\end{document}
\ No newline at end of file
+\end{document}