Beta functions

Syntax: y = BETA(a,b)
y = LNBETA(a,b)
y = BETAIN(x,a,b)

The Complete Beta function, where a and b are both positive:

The natural logarithm of the Beta function, where a and b are both positive:

The incomplete Beta function, where a and b are both positive:

  Bessel functions
  Chebyshev polynomial