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<b>let </b><font color="Maroon">c<sub>1</sub></font> be  <a href="xreal_0.html#V1">real</a>  <a href="ordinal1.html#NM1" target="_self">number</a> ;<br/>

<a NAME="E1:70"/>
 <a href="sin_cos2.html#K4" target="_self">cosh</a>  <a href="fdiff_1.html#R1">is_differentiable_in</a> <font color="Maroon">c<sub>1</sub></font>
 
<b>by </b><i><a class="ref" href="sin_cos2.html#T32" target="_self">Th32</a></i>;<br/>
<b>hence </b><a NAME="E2:70"/>
 <a href="sin_cos2.html#K4" target="_self">cosh</a>  <a href="fcont_1.html#R1">is_continuous_in</a> <font color="Maroon">c<sub>1</sub></font>
 <b>by </b><i><a class="ref" href="fdiff_1.html#T32">FDIFF_1:32</a></i>;<br/>


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