TY  - BOOK
AU  - Heineman, E. Richard
TI  - Plane trigonometry
AV  - QA 533 .H45 1956 
PY  - 1956///
CY  - New York
PB  - McGraw Hill Education
KW  - PLANE TRIGONOMETRY
N1  - Includes index; 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
N2  - The principal objective of the author in writing the second edition of plane trigonometry has been teachability
ER  -