АРККОСИНУС function [ n_data, x, fx ] = arccos_values ( n_data ) %*****************************************************************************80 % %% ARCCOS_VALUES returns some values of the arc cosine function. % % Discussion: % % In Mathematica, the function can be evaluated by: % % ArcCos[x] % % Licensing: % % This code is distributed under the GNU LGPL license. % % Modified: % % 12 June 2007 % % Author: % % [ім’я автора приховано] % % Reference: % % Milton Abramowitz, Irene Stegun, % Handbook of Mathematical Functions, % National Bureau of Standards, 1964, % ISBN: 0-486-61272-4, % LC: QA47.A34. % % Stephen Wolfram, % The Mathematica Book, % Fourth Edition, % Cambridge University Press, 1999, % ISBN: 0-521-64314-7, % LC: QA76.95.W65. % % Parameters: % % Input/output, integer N_DATA. The user sets N_DATA to 0 before the % first call. On each call, the routine increments N_DATA by 1, and % returns the corresponding data; when there is no more data, the % output value of N_DATA will be 0 again. % % Output, real X, the argument of the function. % % Output, real FX, the value of the function. % n_max = 12; fx_vec = [ ... 1.6709637479564564156, ... 1.5707963267948966192, ... 1.4706289056333368229, ... 1.3694384060045658278, ... 1.2661036727794991113, ... 1.1592794807274085998, ... 1.0471975511965977462, ... 0.92729521800161223243, ... 0.79539883018414355549, ... 0.64350110879328438680, ... 0.45102681179626243254, ... 0.00000000000000000000 ]; x_vec = [ ... -0.1, ... 0.0, ... 0.1, ... 0.2, ... 0.3, ... 0.4, ... 0.5, ... 0.6, ... 0.7, ... 0.8, ... 0.9, ... 1.0 ]; if ( n_data < 0 ) n_data = 0; end n_data = n_data + 1; if ( n_max < n_data ) n_data = 0; x = 0.0; fx = 0.0; else x = x_vec(n_data); fx = fx_vec(n_data); end return end