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<span class="kw">take </span>
 <a href="sin_cos.html#K20" title="SIN_COS:func.20">sin</a> 
; <a class="txt" onclick="hs(this)" href="javascript:()"><span class="comment"><font color="Red">::  thesis: </font></span></a><span class="hide">  <a href="sin_cos.html#K20" title="SIN_COS:func.20">sin</a>  is  <a href="funct_9.html#V2" title="FUNCT_9:attr.2">periodic</a> </span><br/>

<span class="kw">thus </span><a NAME="E1:23_2_1"/>
 <a href="sin_cos.html#K20" title="SIN_COS:func.20">sin</a>  is  <a href="funct_9.html#V2" title="FUNCT_9:attr.2">periodic</a> 
 <span class="kw">by</span> <span class="lab"><a class="txt" href="funct_9.html#E23"><span class="lab"><font color="Green" title="E11">L1</font></span></a>, <a class="ref" href="funct_9.html#D2" target="_self" title="FUNCT_9:def.2">Def2</a></span>; <a class="txt" onclick="hs(this)" href="javascript:()"><span class="comment"><font color="Red">::  thesis: </font></span></a><span class="hide"> verum</span><br/>


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