          </span>
<span class="k">                </span><span class="n">prtcls</span><span class="p">%</span><span class="n">E</span><span class="p">(</span><span class="n">pp</span><span class="p">,</span><span class="mi">1</span><span class="p">)</span><span class="o">=</span><span class="p">(</span><span class="n">Etmp</span><span class="p">(</span><span class="mi">1</span><span class="p">)</span><span class="o">*</span><span class="nb">cos</span><span class="p">(</span><span class="n">x</span><span cla