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<div><span class="kw">theorem </span><span class="lab"><font color="Green" title="E12">Th12</font></span>: <a NAME="T12"><span class="comment"><font color="firebrick">:: SIN_COS9:12</font></span><br/></a><div class="add"> <a href="relset_1.html#K2" title="RELSET_1:func.2">rng</a> <a href="sin_cos9.html#K2" title="SIN_COS9:func.2">arccot</a> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <span class="p1"><a href="rcomp_1.html#K2" title="RCOMP_1:func.2">].</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#K2" title="RCOMP_1:func.2">.[</a></span></div></div>
