ChebyshevT

ChebyshevT[n, x] gives the Chebyshev polynomial of the first kind T_n(x).

Examples

Chebyshev T polynomials:

ChebyshevT[0, x]
(* 1 *)

ChebyshevT[2, x]
(* -1 + 2*x^2 *)

ChebyshevT[4, x]
(* 1 - 8*x^2 + 8*x^4 *)

Numerical value:

ChebyshevT[3, 0.5]
(* -1. *)

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