TY  - BOOK
TI  - Formulas, notes and solved problems on plane trigonometry: handy reference book for high school & college students
SN  - 9719013486
U1  - 516.24 
PY  - 1996///
CY  - Manila
PB  - Tru-Copy Publishing House
KW  - Trigonometry
KW  - Problems, exercises, etc
ER  -