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<div><span class="kw">theorem </span><span class="lab"><font color="Green" title="E7">Th13</font></span>: <a NAME="T13"><span class="comment"><font color="firebrick">:: SIN_COS2:13</font></span><br/></a><div class="add"><a href="sin_cos.html#K22" title="SIN_COS:func.22">exp_R</a> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <a href="numbers.html#K5" title="NUMBERS:func.5">0</a> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> 1 <span class="kw">by</span> <span class="lab"><a class="ref" href="sin_cos.html#T51" onmouseover="rs('sin_cos/T51')" onmouseout="rh()">SIN_COS:51</a>, <a class="ref" href="sin_cos.html#D23" onmouseover="rs('sin_cos/D23')" onmouseout="rh()">SIN_COS:def 23</a></span>;<br/></div></div>
