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<div><span class="kw">theorem </span><a NAME="T77"><span class="comment"><font color="firebrick">:: SIN_COS9:77</font></span><br/></a><div class="add"><a href="sin_cos9.html#K1" title="SIN_COS9:func.1">arctan</a> <a href="partfun1.html#K2" title="PARTFUN1:func.2">|</a> <span class="p1">(<span class="default"><a href="sin_cos.html#K26" title="SIN_COS:func.26">tan</a> <a href="relset_1.html#K7" title="RELSET_1:func.7">.:</a> <span class="p2"><a href="rcomp_1.html#K2" title="RCOMP_1:func.2">].</a><span class="default"><span class="p3">(<span class="default"><a href="xcmplx_0.html#K4" title="XCMPLX_0:func.4">-</a> <span class="p4">(<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>,<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><a href="rcomp_1.html#K2" title="RCOMP_1:func.2">.[</a></span></span>)</span> is  <a href="fcont_1.html#V1" title="FCONT_1:attr.1">continuous</a>  <span class="kw">by</span> <span class="lab"><a class="ref" href="sin_cos9.html#T71" target="_self" onmouseover="rs('sin_cos9/T71')" onmouseout="rh()">Th71</a>, <a class="ref" href="fdiff_1.html#T25" onmouseover="rs('fdiff_1/T25')" onmouseout="rh()">FDIFF_1:25</a></span>;<br/></div></div>
