三角计算器/title> <meta name="description" content="三角函数计算器。"> <style> .calc td { font-family:Arial, Helvetica, sans-serif; } .calc span { font-size:xx-large; font-family:"Times New Roman", Times, serif; } .calc select { font-size:x-large; font-family:"Times New Roman", Times, serif; padding:1px; background:#fff; } .calc input { font-size:x-large; font-family:Arial, Helvetica, sans-serif; } .calc input[type=text] { width:100%; } .calc button { margin:7px auto; } /*.calc tr { line-height:40px; }*/ @media all and (max-width: 576px) { .calc { width:100%; padding:8px; } .calc input[type=number] { width:130px; } #x,#y { width:100%; } } @media all and (min-width: 577px) { .calc { padding:20px; width:426px; } .calc input[type=number] { width:200px; } .calc input[type=button], .calc input[type=reset] { font-size:large; } #x { width:200px; } #y { width:305px; } }</style>  <link rel="canonical" href="https://www.titaotie.com/calc/math/trigonometry-calculator.html" /> <script async 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href="index.html">数学计算器</a>/三角计算器!-- #EndEditable --> </div> <div id="top-ad"> <ins class="adsbygoogle" style="display:block" data-ad-client="ca-pub-1832854270693044" data-ad-slot="2671835991" data-ad-format="auto" data-full-width-responsive="true"></ins> </div> <div id="lcol"> <div id="doc">  <p class="doc-update">最后修改时间：2026年5月15日</p> <h1>三角计算器</h1> <h2>直角三角形计算器</h2> <p>输入一侧和另一侧的值，然后i>计算</i>按钮。</p> <form name="calcform1"> <table class="calc"> <tr> <td><label for="a">面A</label></td> <td><input type="number" step="any" id="a" name="a" class="intext" autofocus></td> </tr> <tr> <td><label for="a">b面：</label></td> <td><input type="number" step="any" id="b" name="b" class="intext"></td> </tr> <tr> <td><label for="a">c面：</label></td> <td><input type="number" step="any" id="c" name="c" class="intext"></td> </tr> <tr> <td><label for="a">角度A</label></td> <td><input type="number" step="any" id="anglea" name="anglea" class="intext"></td> <td> <select id="degtype1"> <option selected>°</option> <option>rad </option> </select> </td> </tr> <tr> <td><label for="a">角度B</label></td> <td><input type="number" step="any" id="angleb" name="angleb" class="intext"></td> <td> <select id="degtype2"> <option selected>°</option> <option>rad </option> </select> </td> </tr>  <tr> <td> </td> <td colspan="2"> <button type="button" title="计算" class="btn" onclick="calcright()"><img src="../../assets/lib/icons/glyphicons_all/glyphicons_halflings/glyphicons_halflings_018_cog.png" tppabs="https://www.titaotie.com/assets/lib/icons/glyphicons_all/glyphicons_halflings/glyphicons_halflings-018-cog.png" alt=""> 计算</button> <button type="reset" title="重置" class="btn"><img src="../../assets/lib/icons/glyphicons_all/glyphicons_halflings/glyphicons_halflings_013_remove.png" tppabs="https://www.titaotie.com/assets/lib/icons/glyphicons_all/glyphicons_halflings/glyphicons_halflings-013-remove.png" alt=""> 重置</button> </td> </tr> </table> </form> <h2>三角函数计算器</h2> <form name="calcform2"> <table class="calc"> <tr> <td> <select id="func" class="math" onchange="OnFuncChange()"> <option>罪恶</option> <option>cos </option> <option>tan</option> <option>csc </option> <option></option> <option>婴儿度</option> <option>反正弦</option> <option>arccos</option> <option>Arctan</option> <option>arccsc</option> <option>弧秒</option> <option>Arccot</option> </select> </td> <td><input type="number" step="any" id="x" name="x" class="intext"></td> <td id="sel1"><select id="degtype" name="D1" class="math" onchange="OnSelChange()"> <option selected>°</option> <option>rad </option> </select></td> </tr> <tr> <td colspan="3"> <button type="button" title="计算" class="btn" onclick="calc()"><img src="../../assets/lib/icons/glyphicons_all/glyphicons_halflings/glyphicons_halflings_018_cog.png" tppabs="https://www.titaotie.com/assets/lib/icons/glyphicons_all/glyphicons_halflings/glyphicons_halflings-018-cog.png" alt=""> 计算</button> <button type="reset" title="重置" class="btn"><img src="../../assets/lib/icons/glyphicons_all/glyphicons_halflings/glyphicons_halflings_013_remove.png" tppabs="https://www.titaotie.com/assets/lib/icons/glyphicons_all/glyphicons_halflings/glyphicons_halflings-013-remove.png" alt=""> 重置</button> </td> </tr> <tr> <td colspan="2">结果：</td> </tr> <tr> <td colspan="2"><input type="text" id="y" name="y" class="outtext" readonly></td> <td id="sel2" style="display:none"> <select id="degtype3" name="D2" onchange="OnSelChange()"> <option selected>°</option> <option>rad </option> </select> </td> </tr> </table> </form> <h2>三角函数</h2> <p class="math">sinem>A</em> =对立/斜边= <em>a</em> / <em>c</em></p> <p class="math">cos <em>A</em> =相邻/斜边= <em>b</em> / <em>c</em></p> <p class="math">tanem>A</em> =对面/相邻= <em>a</em> / <em>b</em></p> <p> </p> <p class="math">csc <em>A</em> =斜边/相反= <em>c</em> / <em>a</em></p> <p class="math">em>A</em> =斜边/相邻= <em>c</em> / <em>b</em></p> <p class="math">婴儿度em>A</em> =相邻/对面= <em>b</em> / <em>a</em></p> <p> </p> <p> </p> <div id="bottom-ad_2"> </div><hr> <h2>另请参阅</h2> <ul class="seealso"> <li><a href="../../math/trigonometry/index.html">三角函数</a></li> <li><a href="sin-calculator.html">正弦计算器</a></li> <li><a href="cos-calculator.html">余弦计算器</a></li> <li><a href="tan-calculator.html">正切计算器</a></li> <li><a href="arcsin-calculator.html">Arcsin计算器</a></li> <li><a href="arccos-calculator.html">Arccos计算器</a></li> <li><a href="arctan-calculator.html">Arctan计算器</a></li> <li><a href="../../convert/number/degrees-to-radians.html">度到弧度的转换</a></li> <li><a href="../../convert/number/radians-to-degrees.html">弧度到度的转换</a></li> <li><a href="../../convert/number/degrees-to-degrees-minutes-seconds.html">度到度，分，</a></li> <li><a href="../../convert/number/degrees-minutes-seconds-to-degrees.html">度，分，秒至度</a></li> </ul>  <div id="ban-ad"> </div>   </div> </div> <div id="rcol"> <p style="text-align: center;font-size: 13px;">广告</p> <ins class="adsbygoogle" style="display:block" data-ad-client="ca-pub-1832854270693044" 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