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