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diff --git a/help/C/trigonometry.page b/help/C/trigonometry.page new file mode 100644 index 0000000..bca5ecf --- /dev/null +++ b/help/C/trigonometry.page @@ -0,0 +1,46 @@ +<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> |