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<div><span class="kw">theorem </span><a NAME="T76"><span class="comment"><font color="firebrick">:: FUNCT_8:76</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">A</font> being   <a href="funct_8.html#V1" title="FUNCT_8:attr.1">symmetrical</a>  <a href="subset_1.html#NM2" title="SUBSET_1:NM.2">Subset</a> of <a href="numbers.html#K1" title="NUMBERS:func.1">REAL</a> holds  <a href="sin_cos.html#K18" title="SIN_COS:func.18">cos</a> <a href="valued_1.html#K37" title="VALUED_1:func.37">"</a>  <a href="funct_8.html#R1" title="FUNCT_8:pred.1">is_even_on</a> <font color="Olive" title="b1">A</font></div></div>
