still testing

1 files changed, 1 insertions, 1 deletions

diff --git a/Fourier Series.page b/Fourier Series.page
index 61253ee..751b1c3 100644
--- a/Fourier Series.page
+++ b/Fourier Series.page
@@ -23,7 +23,7 @@ $\qquad\sin(2x) = 2\sin(x)\cos(x)$
   
 Rearranging,
 $$\begin{array}{ccl} 
-\sin(2x).\cos(x) & = & [2\sin(x)\cos(x)]\cos(x)\\
+\sin(2x).\cos(x) & = & [2\sin(x)\cos(x)].\cos(x)\\
  & = & 1+iy-\frac{y^{2}}{2!}-i\frac{y^{3}}{3!}+\frac{y^{4}}{4!}+i\frac{y^{5}}{5!}+\cdots\\
  & = & (1-\frac{y^{2}}{2!}+\frac{y^{4}}{4!}+\cdots)+i(y-\frac{y^{3}}{3!}+\frac{y^{5}}{5!}-\cdots)\\
  & = & \cos y+i\sin y\end{array}$$