Heineman, E. Richard <br/><br/>
Plane trigonometry / 
E. Richard Heineman 
 - Second Edition. 
 - New York :  McGraw-Hill Book Company, Inc.,  c1956. 
 - xi, 165 pages ;  23 cm. 
<br/><br/>Includes index. 
<br/><br/>Chapter 1. The trigonometric functions -- Chapter 2. Trigonometric functions of an acute angle -- Chapter 3. Trigonometric identities -- Chapter 4. Related angles -- Chapter 5. Radian measure. 
<br/><br/> The principal objective of the author in writing the second edition of plane trigonometry has been teachability. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>PLANE TRIGONOMETRY
<br/><br/><label>LC Class. No.: </label>QA 533 .H45 1956