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