The BESSELK function returns the modified Bessel functions, Kn(x), which are also known as the hyperbolic Bessel Functions. These are the equivalent of the Bessel functions, evaluated for purely imaginary arguments.

Syntax

=BESSELK(x,n)

Arguments

Argument Description
x The value at which to evaluate the function
n The order of the function. If n is not an integer, it is truncated

Examples

  A B C
1 Formula Result  Notes
2 =BESSELK(1.5, 1) 0.277387804 Modified Bessel function at 1.5 with an order of 1

Common Function Error(s)

Problem What went wrong
#VALUE! Occurs if any of the supplied arguments are non-numeric
#NUM! Occurs if either:

  the supplied value of x is ≤ 0
  the supplied value of n is < 0
#NAME? Occurs when Analysis ToolPak add-in is not enabled