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<div><span class="kw">theorem </span><span class="lab"><font color="Green" title="E86">Th67</font></span>: <a NAME="T68"><span class="comment"><font color="firebrick">:: SIN_COS:68</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">th</font> being   <a href="xreal_0.html#NM1" title="XREAL_0:NM.1">Real</a> holds <br/> (  <a href="sin_cos.html#K16" title="SIN_COS:func.16">sin</a>  <a href="fdiff_1.html#R2" title="FDIFF_1:pred.2">is_differentiable_on</a>  <a href="numbers.html#K1" title="NUMBERS:func.1">REAL</a>  &amp;  <a href="fdiff_1.html#K1" title="FDIFF_1:func.1">diff</a> (<a href="sin_cos.html#K16" title="SIN_COS:func.16">sin</a>,<font color="Olive" title="b1">th</font>) <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <a href="sin_cos.html#K18" title="SIN_COS:func.18">cos</a> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Olive" title="b1">th</font> )</div></div>
