Theory, practice and techniques in trigonometry / edited by Aleksandar Mratinkovic - New York : 3G E-learning, c2018. - vii, 262 pages : color illustrations ; 22 cm. Includes index and bibliographical references. ISBN: 9781680949056 Subjects--Topical Terms: Trigonometry--Study and teaching Dewey Class. No.: Circ. 516.24 T828 2018