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<a NAME="E1:123"/>
0 <a href="hidden.html#R2">in</a> <span class="p1"><a href="rcomp_1.html#K1">[.</a><span class="default">0,1</span><a href="rcomp_1.html#K1">.]</a></span>
 
<b>by </b><i><a class="ref" href="rcomp_1.html#T48">RCOMP_1:48</a></i>;<br/>
<b>then </b><i><font color="Green">E104</font></i>: <span class="p1">(<span class="default"><a href="sin_cos.html#K19" target="_self">sin</a>  <a href="rfunct_1.html#K2">/</a> <a href="sin_cos.html#K22" target="_self">cos</a> </span>)</span> <a href="seq_1.html#K2">.</a> 0 = 
<span class="p1">(<span class="default"><a href="sin_cos.html#K19" target="_self">sin</a>  <a href="seq_1.html#K2">.</a> 0</span>)</span> <a href="real_1.html#K4">*</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="sin_cos.html#K22" target="_self">cos</a>  <a href="seq_1.html#K2">.</a> 0</span>)</span> <a href="real_1.html#K2">"</a> </span>)</span>
<b>by </b><i><a class="ref" href="sin_cos.html#T75" target="_self">Th75</a>, <a class="ref" href="rfunct_1.html#D4">RFUNCT_1:def 4</a></i>
<br/>.= 
0
<b>by </b><i><a class="ref" href="sin_cos.html#T33" target="_self">Th33</a></i>
;<br/>
<a NAME="E3:123"/>
1 <a href="hidden.html#R2">in</a> <span class="p1"><a href="rcomp_1.html#K1">[.</a><span class="default">0,1</span><a href="rcomp_1.html#K1">.]</a></span>
 
<b>by </b><i><a class="ref" href="rcomp_1.html#T48">RCOMP_1:48</a></i>;<br/>
<b>then </b><span class="p1">(<span class="default"><a href="sin_cos.html#K19" target="_self">sin</a>  <a href="rfunct_1.html#K2">/</a> <a href="sin_cos.html#K22" target="_self">cos</a> </span>)</span> <a href="seq_1.html#K2">.</a> 1 = 
<span class="p1">(<span class="default"><a href="sin_cos.html#K19" target="_self">sin</a>  <a href="seq_1.html#K2">.</a> 1</span>)</span> <a href="real_1.html#K4">*</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="sin_cos.html#K22" target="_self">cos</a>  <a href="seq_1.html#K2">.</a> 1</span>)</span> <a href="real_1.html#K2">"</a> </span>)</span>
<b>by </b><i><a class="ref" href="sin_cos.html#T75" target="_self">Th75</a>, <a class="ref" href="rfunct_1.html#D4">RFUNCT_1:def 4</a></i>
<br/>.= 
<span class="p1">(<span class="default"><a href="sin_cos.html#K19" target="_self">sin</a>  <a href="seq_1.html#K2">.</a> 1</span>)</span> <a href="real_1.html#K6">/</a> <span class="p1">(<span class="default"><a href="sin_cos.html#K22" target="_self">cos</a>  <a href="seq_1.html#K2">.</a> 1</span>)</span>
<b>by </b><i><a class="ref" href="xcmplx_0.html#D9">XCMPLX_0:def 9</a></i>
;<br/>
<b>hence </b><a NAME="E5:123"/>
( <span class="p1">(<span class="default"><a href="sin_cos.html#K19" target="_self">sin</a>  <a href="rfunct_1.html#K2">/</a> <a href="sin_cos.html#K22" target="_self">cos</a> </span>)</span> <a href="seq_1.html#K2">.</a> 0 <a href="hidden.html#R1">=</a> 0 &amp; <span class="p1">(<span class="default"><a href="sin_cos.html#K19" target="_self">sin</a>  <a href="rfunct_1.html#K2">/</a> <a href="sin_cos.html#K22" target="_self">cos</a> </span>)</span> <a href="seq_1.html#K2">.</a> 1 <a href="xxreal_0.html#NR4" target="_self">&gt;</a> 1 )
 <b>by </b><i><a class="txt" href="sin_cos.html#E2:123"><i><font color="Green">E104</font></i></a>, <a class="ref" href="sin_cos.html#T47" target="_self">Th47</a>, <a class="ref" href="real_2.html#T142">REAL_2:142</a></i>;<br/>


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