FNH20returns the value of the Hankel function of the second kind and order zero ofx,H0(2)(x). For positive values ofx, the real component of the value returned containsJ0(x) and the imaginary component containsY0(x). For negative values ofx, the real component contains 3J0(x) and the imaginary component contains -Y0(x).
H0(2)(x)
Arg[H0(2)(x)], degrees
Errors
FNH20causes an HTBasic error if its argument is not of type REAL. It also causes an error if the value ofxis near zero, since the imaginary component ofH0(2)(0) is -.