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<a NAME="E1:4_2_1"/>
 <a href="sin_cos.html#K22" title="SIN_COS:func.22">cos</a>  <a href="fcont_1.html#R2" title="FCONT_1:pred.2">is_continuous_on</a>  <a href="relset_1.html#K4" title="RELSET_1:func.4">dom</a> <a href="sin_cos.html#K22" title="SIN_COS:func.22">cos</a> 
 
<b>by </b><i><a class="ref" href="comptrig.html#T44" title="COMPTRIG:th.44">COMPTRIG:44</a>, <a class="ref" href="sin_cos.html#D22" title="SIN_COS:def.22">SIN_COS:def 22</a></i>;<br/>
<b>hence </b><a NAME="E2:4_2_1"/>
 <a href="sin_cos.html#K22" title="SIN_COS:func.22">cos</a>  is <a href="jordan16.html#V1" title="JORDAN16:attr.1">continuous</a>
 <b>by </b><i><a class="ref" href="jordan16.html#D1" title="JORDAN16:def.1">JORDAN16:def 1</a></i>;<br/>


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