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<div><span class="kw">theorem </span><a NAME="T28"><span class="comment"><font color="firebrick">:: COMPTRIG:28</font></span><br/></a><div class="add"> <a href="xtuple_0.html#K10" title="XTUPLE_0:func.10">rng</a> <a href="sin_cos.html#K16" title="SIN_COS:func.16">sin</a> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <span class="p1"><a href="rcomp_1.html#K1" title="RCOMP_1:func.1">[.</a><span class="default"><span class="p2">(<span class="default"><a href="xcmplx_0.html#K4" title="XCMPLX_0:func.4">-</a> 1</span>)</span>,1</span><a href="rcomp_1.html#K1" title="RCOMP_1:func.1">.]</a></span></div></div>
