Appreciating trigonometry / Simon L. Chua ... [et.al.]. - Quezon City : Phoenix Publishing House, Inc., 2006. - ix, 369 pages : illustration ; 25 centimeter. Includes bibliographical references and index. ISBN: 9710626671 Subjects--Topical Terms: Trigonometry. Dewey Class. No.: FIL 516.24 Ap1 2006