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<page xmlns="http://projectmallard.org/1.0/"
type="guide"
id="trigonometry">
<info>
<link type="guide" xref="index#equation"/>
</info>
<title>Trigonometry</title>
<p>
Trigonometry can be performed using the sin, cos, and tan <link xref="function">function</link>.
</p>
<example>
<p>
sin 45
</p>
</example>
<p>
The angle units used can be changed from the <guiseq><gui>Calculator</gui><gui>Preferences</gui></guiseq> menu.
Trigonometry buttons are visible when in <link xref="mouse">Advanced mode</link>.
</p>
<p>
Hyperbolic functions are available by adding "h" to the end of a function.
</p>
<example>
<p>
sinh 0.34
</p>
</example>
<p>
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.
The following two equations are equivalent.
</p>
<example>
<p>
sin⁻¹ 0.5
</p>
<p>
asin 0.5
</p>
</example>
<p>
To enter <link xref="variable">π</link> with the keyboard use <keyseq><key>Ctrl</key><key>P</key></keyseq>.
</p>
</page>
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