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<a NAME="E1:6_1_1"/>
 <a href="sin_cos.html#K35">PI</a>  <a href="hidden.html#R2">in</a> <span class="p1"><a href="rcomp_1.html#K2">].</a><span class="default">0,4</span><a href="rcomp_1.html#K2">.[</a></span>
 
<b>by </b><i><a class="ref" href="sin_cos.html#D32">SIN_COS:def 32</a></i>;<br/>
<a NAME="E2:6_1_1"/><b>then </b>
0 <a href="xxreal_0.html#NR3" target="_self">&lt;</a>  <a href="sin_cos.html#K35">PI</a> 
 
<b>by </b><i><a class="ref" href="rcomp_1.html#T47">RCOMP_1:47</a></i>;<br/>
<b>hence </b><a NAME="E3:6_1_1"/>
not  <a href="sin_cos.html#K35">PI</a>  is <a href="xxreal_0.html#V3">negative</a>
 ;<br/>


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