Returns nodes and weights of Gauss-Chebyshev quadrature
[x,w]=chebyshev_quadrature(n)
a 1-by-1 matrix of doubles, integer value, n>=0, the number of nodes.
a n-by-1 matrix of doubles, the nodes
a n-by-1 matrix of doubles, the weights
Returns nodes x and weights w of Gauss-Chebyshev quadrature.