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<div><span class="kw">theorem </span><span class="lab"><font color="Green" title="E139">Th123</font></span>: <a NAME="T123"><span class="comment"><font color="firebrick">:: SINCOS10:123</font></span><br/></a><div class="add"> <a href="sincos10.html#K3" title="SINCOS10:func.3">arccosec1</a>  <a href="fdiff_1.html#R2" title="FDIFF_1:pred.2">is_differentiable_on</a> <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></div></div>
