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







<b>thus </b> <a href="complex2.html#K4" target="_self">angle</a> <font color="Maroon">a</font>,<font color="Maroon">b</font>,<font color="Maroon">c</font> = 
 <a href="complex2.html#K4" target="_self">angle</a> <span class="p1">(<span class="default"><font color="Maroon">a</font> <a href="complex1.html#K11">-</a> <font color="Maroon">b</font></span>)</span>,<a href="complex1.html#K5">0c</a> ,<span class="p1">(<span class="default"><font color="Maroon">c</font> <a href="complex1.html#K11">-</a> <font color="Maroon">b</font></span>)</span>
<b>by </b><i><a class="ref" href="complex2.html#T23" target="_self">Th23</a></i>
<br/>.= 
 <a href="complex2.html#K4" target="_self">angle</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><font color="Maroon">a</font> <a href="complex1.html#K8">+</a> <font color="Maroon">d</font></span>)</span> <a href="complex1.html#K11">-</a> <span class="p2">(<span class="default"><font color="Maroon">b</font> <a href="complex1.html#K8">+</a> <font color="Maroon">d</font></span>)</span></span>)</span>,<a href="complex1.html#K5">0c</a> ,<span class="p1">(<span class="default"><span class="p2">(<span class="default"><font color="Maroon">c</font> <a href="complex1.html#K8">+</a> <font color="Maroon">d</font></span>)</span> <a href="complex1.html#K11">-</a> <span class="p2">(<span class="default"><font color="Maroon">b</font> <a href="complex1.html#K8">+</a> <font color="Maroon">d</font></span>)</span></span>)</span>

<br/>.= 
 <a href="complex2.html#K4" target="_self">angle</a> <span class="p1">(<span class="default"><font color="Maroon">a</font> <a href="complex1.html#K8">+</a> <font color="Maroon">d</font></span>)</span>,<span class="p1">(<span class="default"><font color="Maroon">b</font> <a href="complex1.html#K8">+</a> <font color="Maroon">d</font></span>)</span>,<span class="p1">(<span class="default"><font color="Maroon">c</font> <a href="complex1.html#K8">+</a> <font color="Maroon">d</font></span>)</span>
<b>by </b><i><a class="ref" href="complex2.html#T23" target="_self">Th23</a></i>
;<br/>


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