\BOOKMARK [1][-]{section.1}{Introduction}{}% 1
\BOOKMARK [1][-]{section.2}{A correction}{}% 2
\BOOKMARK [1][-]{section.3}{Alternative proofs of three results}{}% 3
\BOOKMARK [1][-]{section.4}{More properties}{}% 4
\BOOKMARK [2][-]{subsection.4.1}{Minimal polynomials of sine values}{section.4}% 5
\BOOKMARK [1][-]{section.5}{Acknowledgments}{}% 6