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<h1>BESSELK Function</h1>
<p>The <b>BESSELK</b> function is one of the engineering functions. It is used to return the modified Bessel function, which is equivalent to the Bessel functions evaluated for purely imaginary arguments.</p>
<p>The <b>BESSELK</b> function syntax is:</p>
<p style="text-indent: 150px;"><b><em>BESSELK(X, N)</em></b></p>
<p><em>where</em></p>
<p style="text-indent: 50px;"><b><em>X</em></b> is the value at which to evaluate the function, a numeric value greater than 0,</p>
<p style="text-indent: 50px;"><b><em>N</em></b> is the order of the Bessel function, a numeric value greater than or equal to 0.</p>
<p>The numeric values can be entered manually or included into the cell you make reference to.</p>
<p>To apply the <b>BESSELK</b> function,</p>
<ol>
<li>select the cell where you wish to display the result,</li>
<li>click the <b>Insert function</b> <img alt="Insert function icon" src="../images/insertfunction.png" /> icon situated at the top toolbar,
<br />or right-click within a selected cell and select the <b>Insert Function</b> option from the menu,
<br />or click the <img alt="Function icon" src="../images/function.png" /> icon situated at the formula bar,
</li>
<li>select the <b>Engineering</b> function group from the list,</li>
<li>click the <b>BESSELK</b> function,</li>
<li>enter the required arguments separating them by comma,</li>
<li>press the <b>Enter</b> button.</li>
</ol>
<p>The result will be displayed in the selected cell.</p>
<p style="text-indent: 150px;"><img alt="BESSELK Function" src="../images/besselk.png" /></p>
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