l">&amp;</span> <span class="identifier">o</span><span class="special">);</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">T</span><span class="special">&gt;</span> <span class="identifier">octonion</span><span class="special">&lt;</span><span class="identifier">T</span><span class="special">&gt;</span> <a class="link" href="oct_trans.html#math_toolkit.oct_trans.tan">tan</a><span class="special">(</span><span class="i