The BESSELI () is an engineering function which takes x, n as argument and returns the modified Bessel function which is equivalent to the Bessel function evaluated for purely imaginary arguments.
Formula:
=BESSELI(x,n) In the above syntax, the argument x denotes the value at which the function is to be evaluated and n denotes the positive integer representing the order of the function.
Video Tutorial:
Let us see how the BESSELI function works with the help of the below video.