3.5.2.4.1.5 Y1

Description

This function returns the first order Bessel function of the second kind and has the following form:


Y1(x)

The formula for the equation is:

Y_1(x)=\lim_{v \rightarrow 1} Y_1(v, 1)

where

Y_1(v,1)=\frac{J_{1}(x,v)\cos(v\pi)-J_{1}(x,-v)}{sin(v\pi)}

Syntax

double y1(double x)

Parameter

x

the input parameter.

Return

Returns the first order Bessel function of second kind at x.

Example

aa = y1(5);
aa = ; //0.14786314339123

See Also

J0, J1, Jn, Y0, Yn