From eb85885d6eb06a2cbe5060a1966353f2c2f05e1b Mon Sep 17 00:00:00 2001
From: Michael Wimmer <m.t.wimmer@tudelft.nl>
Date: Sun, 30 Aug 2020 21:28:42 +0000
Subject: [PATCH] Fix missing i in expression for sine. Closes #5

---
 src/1_complex_numbers.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/1_complex_numbers.md b/src/1_complex_numbers.md
index af83ebd..50bbdea 100644
--- a/src/1_complex_numbers.md
+++ b/src/1_complex_numbers.md
@@ -173,7 +173,7 @@ As a result, $y$ is only defined up to $2\pi$.
 
 Furthermore, we can define the sine and cosine in terms of complex exponentials:
 $$\cos(x) = \frac{e^{{\rm i} x} + e^{-{\rm i} x}}{2}$$
-$$\sin(x) = \frac{e^{{\rm i} x} - e^{-{\rm i} x}}{2}$$
+$$\sin(x) = \frac{e^{{\rm i} x} - e^{-{\rm i} x}}{2i}$$
 
 Most operations on complex numbers are easiest when converting the complex number to its *polar form*, using the exponential.
 Some operations which are common in real analysis are then easily derived for their complex counterparts:
-- 
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