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<?xml version="1.0" encoding="utf-8"?>
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<page xmlns="http://projectmallard.org/1.0/" type="guide" id="trigonometry">
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<link type="guide" xref="index#equation"/>
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<title>Trigonometry</title>
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Trigonometry can be performed using the sin, cos, and tan <link xref="function">function</link>.
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The angle units used can be changed from the <guiseq><gui>Calculator</gui><gui>Preferences</gui></guiseq> menu.
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Trigonometry buttons are visible when in <link xref="mouse">scientific mode</link>.
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Hyperbolic functions are available by adding "h" to the end of a function.
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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.
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The following two equations are equivalent.
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To enter <link xref="variable">π</link> with the keyboard use <keyseq><key>Ctrl</key><key>P</key></keyseq>.