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<a NAME="E1:9"/>
0 <a href="real_1.html#K3">+</a> <a href="sin_cos.html#K35">PI</a>  <a href="xxreal_0.html#NR3" target="_self">&lt;</a> <a href="sin_cos.html#K35">PI</a>  <a href="real_1.html#K3">+</a> <a href="sin_cos.html#K35">PI</a> 
 
<b>by </b><i>, <a class="ref" href="xreal_1.html#T8">XREAL_1:8</a></i>;<br/>
<b>hence </b><a NAME="E2:9"/>
 <a href="sin_cos.html#K35">PI</a>  <a href="xxreal_0.html#NR3" target="_self">&lt;</a> 2 <a href="real_1.html#K4">*</a> <a href="sin_cos.html#K35">PI</a> 
 ;<br/>


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