Trigonometry/ 
Margaret Lial... [et al.] 
 - 10th ed. 
 - Harlow, England:  Pearson education Limited,  c2014. 
 - 516 p.:  ill.;  28 cm. 
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label>978-1-292-02360-1 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Trigonometry.
<br/><br/><label>Dewey Class. No.: </label>GC 516.24 T828 2014