_T_POLY_COEF</b> evaluates the Chebyshev T polynomial coefficients.
        </li>
        <li>
          <b>CHEBY_T_POLY_VALUES</b> returns values of the Chebyshev T polynomial.
        </li>
        <li>
          <b>CHEBY_T_POLY_ZERO</b> returns zeroes of the Chebyshev polynomial T(N)(X).
        </li>
        <li>
          <b>CHEBY_U_POLY</b> evaluates the Chebyshev polynomials of the second kind.
        </li>
        <li>
          <b>CHEBY_U_POLY_COEF</b> evaluates the Chebyshev U polynomial coeffici