<?xml version="1.0"?>
<div><span class="kw">theorem </span><a NAME="T90"><span class="comment"><font color="firebrick">:: SIN_COS6:90</font></span><br/></a><div class="add"><a href="sin_cos6.html#K3" title="SIN_COS6:func.3">arccos</a> <a href="funct_1.html#NK3" title="FUNCT_1:NK.3">*</a> <span class="p1">(<span class="default"><a href="sin_cos.html#K18" title="SIN_COS:func.18">cos</a> <a href="relset_1.html#K5" title="RELSET_1:func.5">|</a> <span class="p2"><a href="rcomp_1.html#K1" title="RCOMP_1:func.1">[.</a><span class="default"><a href="numbers.html#K5" title="NUMBERS:func.5">0</a>,<a href="sin_cos.html#K28" title="SIN_COS:func.28">PI</a></span><a href="rcomp_1.html#K1" title="RCOMP_1:func.1">.]</a></span></span>)</span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="partfun1.html#K6" title="PARTFUN1:func.6">id</a> <span class="p1"><a href="rcomp_1.html#K1" title="RCOMP_1:func.1">[.</a><span class="default"><a href="numbers.html#K5" title="NUMBERS:func.5">0</a>,<a href="sin_cos.html#K28" title="SIN_COS:func.28">PI</a></span><a href="rcomp_1.html#K1" title="RCOMP_1:func.1">.]</a></span> <span class="kw">by</span> <span class="lab"><a class="txt" href="sin_cos6.html#E104"><span class="lab"><font color="Green" title="E70">Lm16</font></span></a>, <a class="ref" href="sin_cos6.html#T85" target="_self" onmouseover="rs('sin_cos6/T85')" onmouseout="rh()">Th85</a>, <a class="ref" href="funct_1.html#T39" onmouseover="rs('funct_1/T39')" onmouseout="rh()">FUNCT_1:39</a></span>;<br/></div></div>
