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 <a href="sin_cos.html#K28" title="SIN_COS:func.28">PI</a>  <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <span class="p1"><a href="rcomp_1.html#K2" title="RCOMP_1:func.2">].</a><span class="default"><a href="numbers.html#K5" title="NUMBERS:func.5">0</a>,4</span><a href="rcomp_1.html#K2" title="RCOMP_1:func.2">.[</a></span>
 
<span class="kw">by</span> <span class="lab"><a class="ref" href="sin_cos.html#D28" onmouseover="rs('sin_cos/D28')" onmouseout="rh()">SIN_COS:def 28</a></span>;<br/>
<span class="kw">hence </span><a NAME="E2:6_1_1"/>
 not  <a href="sin_cos.html#K28" title="SIN_COS:func.28">PI</a>  is  <a href="xxreal_0.html#V3" title="XXREAL_0:attr.3">negative</a> 
 <span class="kw">by</span> <span class="lab"><a class="ref" href="xxreal_1.html#T4" onmouseover="rs('xxreal_1/T4')" onmouseout="rh()">XXREAL_1:4</a></span>; <a class="txt" onmouseover="tooltip.show('hs',this)" onmouseout="tooltip.hide()" onclick="hs(this)" href="javascript:()"><span class="comment"><font color="firebrick">::  thesis: </font></span></a><span class="hide"> verum</span><br/>


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