# airy_bi_deriv

## Definition:

$Bi\_deriv = airy\_bi\_deriv(x)$ evaluates an approximation to the derivative of the Airy function Bi(x). It is based on a number of Chebyshev expansions.

$Bi\_deriv(x)$ (output, double)
Approximation of the derivative of the Airy function $B_i(x)$.