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<b>let </b><font color="Maroon">a</font> be    <a href="subset_1.html#M1">Element</a> of  <a href="numbers.html#K2">COMPLEX</a> ;<br/><b>let </b><font color="Maroon">b</font> be    <a href="subset_1.html#M1">Element</a> of  <a href="numbers.html#K2">COMPLEX</a> ;<br/>



<b>assume </b><a NAME="E1:65"/>
( <font color="Maroon">a</font> <a href="hidden.html#NR2" target="_self">&lt;&gt;</a> 0 &amp; <font color="Maroon">b</font> <a href="hidden.html#NR2" target="_self">&lt;&gt;</a> 0 )
 ;<br/>

<b>hence </b> <a href="complex2.html#K3" target="_self">angle</a> <font color="Maroon">a</font>,<font color="Maroon">b</font> = 
 <a href="complex2.html#K3" target="_self">angle</a> <span class="p1">(<span class="default"><a href="complex2.html#K2" target="_self">Rotate</a> <font color="Maroon">a</font>,<a href="sin_cos.html#K35">PI</a> </span>)</span>,<span class="p1">(<span class="default"><a href="complex2.html#K2" target="_self">Rotate</a> <font color="Maroon">b</font>,<a href="sin_cos.html#K35">PI</a> </span>)</span>
<b>by </b><i/>
<br/>.= 
 <a href="complex2.html#K3" target="_self">angle</a> <span class="p1">(<span class="default"><a href="complex1.html#K10">-</a> <font color="Maroon">a</font></span>)</span>,<span class="p1">(<span class="default"><a href="complex2.html#K2" target="_self">Rotate</a> <font color="Maroon">b</font>,<a href="sin_cos.html#K35">PI</a> </span>)</span>
<b>by </b><i/>
<br/>.= 
 <a href="complex2.html#K3" target="_self">angle</a> <span class="p1">(<span class="default"><a href="complex1.html#K10">-</a> <font color="Maroon">a</font></span>)</span>,<span class="p1">(<span class="default"><a href="complex1.html#K10">-</a> <font color="Maroon">b</font></span>)</span>
<b>by </b><i/>
;<br/><br/>


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