Schaum's Outline of Trigonometry./ 
by Robert E. Moyer, Frank Ayres, Jr. 
 - 6th ed. 
 - New York, N.Y.  McGraw-Hill Education,  2018 
<br/><br/><label>ISBN: </label>9781260011487 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Trigonometry Mathematics Mathematics. Trigonometry.