Engineering - BESSELK Function

Description

The BESSELK function returns the modified Bessel function Kn(x), which is equivalent to the Bessel functions evaluated for purely imaginary arguments.

These are also known as the hyperbolic Bessel Functions.

Syntax

BESSELK(X, N)

Arguments

Argument	Description	Required/ Optional
X	The value at which to evaluate the function.	Required
N	The order of the function. If n is not an integer, it is truncated.	Required

Notes

If x is nonnumeric, BESSELK returns the #VALUE! Error value.
If n is nonnumeric, BESSELK returns the #VALUE! Error value.
If n < 0, BESSELK returns the #NUM! Error value.
The n-th order modified Bessel function of the variable x is −

$$K_n(x)=\frac{\pi}{2}i^{n+1}[J_n(ix)+iY_n(ix)]$$

Where Jn and Yn are the J and Y Bessel functions, respectively.

Applicability

Excel 2007, Excel 2010, Excel 2013, Excel 2016

Example

advanced_excel_engineering_functions.htm