Brummelen, Glen Van <br/><br/>
Trigonometry :  a very short introduction / 
Glen Van Brummelen 
 - Oxford, United Kingdom :  Oxford University Press,  2020. 
 - xxii, 163 pages ;  18 cm. 
<br/><br/> Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>9780198814313   Pb. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Trigonometry
<br/><br/><label>LC Class. No.: </label>QA 531 B78 2020 CIRC