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<div><span class="kw">theorem </span><span class="lab"><font color="Green" title="E22">Th19</font></span>: <a NAME="T19"><span class="comment"><font color="firebrick">:: INTEGRA8:19</font></span><br/></a><div class="add"><a href="sin_cos2.html#K3" title="SIN_COS2:func.3">cosh</a> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> 1 <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="power.html#K4" title="POWER:func.4">number_e</a> <a href="square_1.html#K1" title="SQUARE_1:func.1">^2</a></span>)</span> <a href="xcmplx_0.html#K2" title="XCMPLX_0:func.2">+</a> 1</span>)</span> <a href="xcmplx_0.html#K7" title="XCMPLX_0:func.7">/</a> <span class="p1">(<span class="default">2 <a href="xcmplx_0.html#K3" title="XCMPLX_0:func.3">*</a> <a href="power.html#K4" title="POWER:func.4">number_e</a></span>)</span></div></div>
