View source for $ArcCos

<span class="pageSubtitle">Inverse cosine</span>
<p class="warn"><b>Note: </b>Many $functions have been deprecated in favor of Object Oriented
methods. There is currently no direct OO equivalent for the $ArcCos function.</p>

The <var>$ArcCos</var> function returns
the arccosine (in radians) of a given argument.
If the magnitude of the argument exceeds 1, an error message is printed
and a 0 is returned.

==Syntax==
<p class="syntax"><span class="term">%num</span><span class="literal"> = $ArcCos(</span><span class="term">x</span><span class="literal">)</span>  </p>

[[Category: Mathematical $functions]]