1<?xml version="1.0" encoding="utf-8"?>
2<page xmlns="http://projectmallard.org/1.0/" type="guide" id="trigonometry" xml:lang="nn">
3
4    <info>
5        <link type="guide" xref="index#equation"/>
6    </info>
7
8	<title>Trigonometry</title>
9
10    <p>
11    Trigonometry can be performed using the sin, cos, and tan <link xref="function">function</link>.
12    </p>
13    <example>
14    <p>
15    sin 45
16    </p>
17    </example>
18    <p>
19    The angle units used can be changed from the <guiseq><gui>Calculator</gui><gui>Preferences</gui></guiseq> menu.
20    Trigonometry buttons are visible when in <link xref="mouse">Advanced mode</link>.
21    </p>
22    <p>
23    Hyperbolic functions are available by adding "h" to the end of a function.
24    </p>
25    <example>
26    <p>
27    sinh 0.34
28    </p>
29    </example>
30    <p>
31    Inverse functions are entered either using the inverse symbol ⁻¹ (<keyseq><key>Ctrl</key><key>I</key></keyseq>) or the "a" form of the function.
32    The following two equations are equivalent.
33    </p>
34    <example>
35    <p>
36    sin⁻¹ 0.5
37    </p>
38    <p>
39    asin 0.5
40    </p>
41    </example>
42    <p>
43    To enter <link xref="variable">π</link> with the keyboard use <keyseq><key>Ctrl</key><key>P</key></keyseq>.
44    </p>
45</page>
46