[gnome-calculator] Fix of bug 748897; added brief explanations of each function

[Robert Roth <robertroth src gnome org>]

commit 3ce985ab21b5b911ad11f2ef754f191d5bc42fad
Author: David Faour <david faour ca>
Date:   Sun Aug 13 20:13:16 2017 -0300

    Fix of bug 748897; added brief explanations of each function

 help/C/complex.page |   52 ++++++++++++++++++++++++++++++++++++++++++++++++++-
 1 files changed, 51 insertions(+), 1 deletions(-)
---
diff --git a/help/C/complex.page b/help/C/complex.page
index 57d28ba..1638587 100644
--- a/help/C/complex.page
+++ b/help/C/complex.page
@@ -9,6 +9,56 @@
        <title>Complex Numbers</title>
     
     <p>
-    Complex numbers are not supported in <app>Calculator</app>.
+    <app>Calculator</app> supports complex numbers, as well as the following functions while in <link 
xref="mouse">Advanced mode</link>.
     </p>
+
+    <table>
+    
+    <tr>
+    <td><p>Re</p></td>
+    <td><p>Returns the real part of a complex number. For example:</p>
+    <example>
+    <p>
+    Re (2-5i) = 2
+    </p>
+    </example>
+    </td>
+    </tr>
+
+    <tr>
+    <td><p>Im</p></td>
+    <td><p>Returns the imaginary part of a complex number. For example:</p>
+    <example>
+    <p>
+    Im (2-5i) = -5
+    </p>
+    </example>
+    </td>
+    </tr>
+ 
+    <tr>
+    <td><p>conj</p></td>
+    <td><p>Returns the conjugate of a complex number. For example:</p>
+    <example>
+    <p>
+    conj (2-5i) = 2+5i
+    </p>
+    </example>
+    </td>
+    </tr>
+
+    <tr>
+    <td><p>Arg</p></td>
+    <td><p>Returns the argument of a complex number. For example:</p>
+    <example>
+    <p>
+    Arg (2-5i) = -68.1986
+    </p>
+    </example>
+    </td>
+    </tr> 
+
+    </table>
+
+
 </page>