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<div><span class="kw">theorem </span><a NAME="T127"><span class="comment"><font color="firebrick">:: SINCOS10:127</font></span><br/></a><div class="add"><a href="fdiff_9.html#K2" title="FDIFF_9:func.2">cosec</a> <a href="relset_1.html#K7" title="RELSET_1:func.7">.:</a> <span class="p1"><a href="rcomp_1.html#K2" title="RCOMP_1:func.2">].</a><span class="default"><span class="p2">(<span class="default"><a href="xcmplx_0.html#K4" title="XCMPLX_0:func.4">-</a> <span class="p3">(<span class="default"><a href="sin_cos.html#K28" title="SIN_COS:func.28">PI</a> <a href="xcmplx_0.html#K7" title="XCMPLX_0:func.7">/</a> 2</span>)</span></span>)</span>,<a href="numbers.html#K5" title="NUMBERS:func.5">0</a></span><a href="rcomp_1.html#K2" title="RCOMP_1:func.2">.[</a></span> is  <a href="rcomp_1.html#V3" title="RCOMP_1:attr.3">open</a> </div></div>
