为什么 PHP 中 asin 函数会受到浮点数精度误差的影响？

<span><span><span class="hljs-meta"><?php</span></span><span>
</span><span><span class="hljs-comment">// 这是与文章内容无关的 PHP 代码部分</span></span><span>
</span><span><span class="hljs-variable">$randomNumber</span></span><span> = </span><span><span class="hljs-title function_ invoke__">rand</span></span><span>(</span><span><span class="hljs-number">1</span></span><span>, </span><span><span class="hljs-number">100</span></span><span>);
</span><span><span class="hljs-variable">$timestamp</span></span><span> = </span><span><span class="hljs-title function_ invoke__">time</span></span><span>();
</span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"随机数: <span class="hljs-subst">$randomNumber</span></span></span><span>, 时间戳: </span><span><span class="hljs-subst">$timestamp</span></span><span>";
</span><span><span class="hljs-meta">?></span></span><span>

<hr>

</span><span><span class="hljs-meta"><?php</span></span><span>
</span><span><span class="hljs-comment">// 文章正文开始</span></span><span>
</span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"<h1>为什么 PHP 中 asin 函数会受到浮点数精度误差的影响？</h1>"</span></span><span>;

</span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"<p>在 PHP 中，<code>asin()