TY  - BOOK
AU  - Tungcab, Rodolfo G. ; Mangune, Ubaldo P. jr. et al.
TI  - Trigonometry : : worktext 
SN  - 13:978-971-0183-04-3
AV  - 516.24 T73 
PY  - 2011///
CY  - Pateros, Manila
PB  - Grandwater Publishing
N1  - Includes glossary
ER  -