# C1.CalcEngine.ExpressionEngine.MathFunctions.Asin

## Content

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<h1 id="C1_CalcEngine_ExpressionEngine_MathFunctions_Asin_" data-uid="C1.CalcEngine.ExpressionEngine.MathFunctions.Asin*">Asin Method
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<div class="markdown level0 conceptual"></div>



<a id="C1_CalcEngine_ExpressionEngine_MathFunctions_Asin_" data-uid="C1.CalcEngine.ExpressionEngine.MathFunctions.Asin*"></a>
<h4 id="C1_CalcEngine_ExpressionEngine_MathFunctions_Asin_System_Collections_Generic_List_C1_CalcEngine_ExpressionEngine_IExpression__" data-uid="C1.CalcEngine.ExpressionEngine.MathFunctions.Asin(System.Collections.Generic.List{C1.CalcEngine.ExpressionEngine.IExpression})">Asin(List&lt;IExpression&gt;)</h4>
<div class="markdown level1 summary"><p>Returns the arcsine of a number.</p>
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<div class="markdown level1 conceptual"></div>
<h5 class="declaration">Declaration</h5>
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  <pre><code class="lang-csharp hljs">public static object Asin(List&lt;IExpression&gt; source)</code></pre>
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  <pre><code class="lang-vbnet hljs">Public Shared Function Asin(source As List(Of IExpression)) As Object</code></pre>
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<h5 class="parameters">Parameters</h5>
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    <tr>
      <th>Type</th>
      <th>Name</th>
      <th>Description</th>
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    <tr>
      <td><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.collections.generic.list-1">List</a>&lt;<a class="xref" href="C1.CalcEngine.ExpressionEngine.IExpression.html">IExpression</a>&gt;</td>
      <td><span class="parametername">source</span></td>
      <td></td>
    </tr>
  </tbody>
</table>
<h5 class="returns">Returns</h5>
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  <thead>
    <tr>
      <th>Type</th>
      <th>Description</th>
    </tr>
  </thead>
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    <tr>
      <td><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.object">object</a></td>
      <td></td>
    </tr>
  </tbody>
</table>
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