📄 function.atan2.html

📁 php的帮助文档,涉及到PHP的案例和基本语法,以及实际应用内容
💻 HTML
字号:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html> <head>  <title>Arc tangent of two variables</title>  <meta http-equiv="content-type" content="text/html; charset=UTF-8"> </head> <body><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.asinh.html">asinh</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.atan.html">atan</a></div> <div class="up"><a href="ref.math.html">Math Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div id="function.atan2" class="refentry"> <div class="refnamediv">  <h1 class="refname">atan2</h1>  <p class="verinfo">(PHP 4, PHP 5)</p><p class="refpurpose"><span class="refname">atan2</span> &mdash; <span class="dc-title">Arc tangent of two variables</span></p> </div> <div class="refsect1 description">  <h3 class="title">Description</h3>   <div class="methodsynopsis dc-description">    <span class="type">float</span> <span class="methodname"><b><b>atan2</b></b></span>     ( <span class="methodparam"><span class="type">float</span> <tt class="parameter">$y</tt></span>    , <span class="methodparam"><span class="type">float</span> <tt class="parameter">$x</tt></span>    )</div>  <p class="simpara">   This function calculates the arc tangent of the two variables   <i><tt class="parameter">x</tt></i> and <i><tt class="parameter">y</tt></i>.  It is   similar to calculating the arc tangent of   <i><tt class="parameter">y</tt></i> / <i><tt class="parameter">x</tt></i>, except that   the signs of both arguments are used to determine the quadrant of   the result.  </p>  <p class="simpara">   The function returns the result in radians, which is between -PI   and PI (inclusive).  </p> </div> <div class="refsect1 parameters">  <h3 class="title">Parameters</h3>  <p class="para">   <dl>    <dt>     <span class="term"><i><tt class="parameter">y</tt></i></span>     <dd>      <p class="para">       Dividend parameter      </p>     </dd>    </dt>    <dt>     <span class="term"><i><tt class="parameter">x</tt></i></span>     <dd>      <p class="para">       Divisor parameter      </p>     </dd>    </dt>   </dl>  </p> </div> <div class="refsect1 returnvalues">  <h3 class="title">Return Values</h3>  <p class="para">   The arc tangent of <i><tt class="parameter">y</tt></i>/<i><tt class="parameter">x</tt></i>    in radians.  </p> </div> <div class="refsect1 seealso">  <h3 class="title">See Also</h3>  <p class="para">   <ul class="simplelist">    <li class="member"><a href="function.atan.html" class="function" rel="rdfs-seeAlso">atan()</a></li>   </ul>  </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.asinh.html">asinh</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.atan.html">atan</a></div> <div class="up"><a href="ref.math.html">Math Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div></body></html>
⌨️ 快捷键说明

复制代码 Ctrl + C
搜索代码 Ctrl + F
全屏模式 F11
切换主题 Ctrl + Shift + D
显示快捷键 ?
增大字号 Ctrl + =
减小字号 Ctrl + -