%% Maximizing an Objective
% All solvers attempt to minimize an objective function. If you have a maximization problem, that is, a problem of the form
% \max_x f(x),
% then define g(x) = –f(x) and minimize g.
% For example, to find the maximum of \tan(\cos(x)) near x = 5, evaluate

[x,fval] = fminunc(@(x)-tan(cos(x)),5)

% The maximum is 1.5574 (the negative of the reported fval), and occurs at x = 6.2832. This answer is correct because, to five digits, the maximum is \tan(1) = 1.5574, which occurs at x = 2\pi  = 6.2832.
% Copyright 2019 The MathWorks, Inc.