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authorPerberos <[email protected]>2011-11-08 13:50:37 -0300
committerPerberos <[email protected]>2011-11-08 13:50:37 -0300
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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">scientific 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>