Modern trigonometry 
William Wooton ... [et. al.] ; editorial adviser : Albert E. Meder, Jr. 
 - Rev ed. 
 - Boston :  Houghton Mifflin,  1973 
 - viii, 435, [16 p.] :  ill. ;  24 cm. 
<br/><br/> Includes Answers for Modern trigonometry.  Includes index. 
<br/><br/><label>ISBN: </label>0395142768 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Trigonometry, Plane