Swapped in \cdot for .

1 files changed, 3 insertions, 2 deletions

diff --git a/Fourier Series.page b/Fourier Series.page
index 91bad7a..3ede531 100644
--- a/Fourier Series.page
+++ b/Fourier Series.page
@@ -15,7 +15,7 @@ Rearranging,
   
 $\qquad\sin^2(x) = \frac{1-\cos(2x)}{2}$  
   
-$2.\quad\sin(2x).\cos(2x) =  ?$  
+$2.\quad\sin(2x)\cdot\cos(2x) =  ?$  
    
 Based on the double angle formula,  
   
@@ -23,7 +23,7 @@ $\qquad\sin(2x) = 2\sin(x)\cos(x)$
   
 Rearranging,
 $$\begin{array}{ccl} 
-\sin(2x).\cos(x) & = & [2\sin(x)\cos(x)].\cos(x)\\
+\sin(2x)\cdot\cos(x) & = & [2\sin(x)\cos(x)]\cdot\cos(x)\\
  & = & 2 \sin(x) [ 1 - \sin^2(x)]\\
  & = & 2\sin(x) - 2\sin^3(x)\\
 \end{array}$$
@@ -53,6 +53,7 @@ $$
 e^{i\theta} & = & \cos \theta + i \sin \theta\\
 \end{array}
 $$
+
 ##What is the Fourier series actually?</b>
 
 ##Why is Fourier series useful? </b>