TY  - BOOK
AU  - Ratti, J.S.
AU  - McWaters, Marcus.
TI  - Precalculus: A unit circle approach
SN  - 9780321537096
AV  - QA 331 .R358 2009 
PY  - 2009///
CY  - Boston
PB  - Addison-Wesley
KW  - Funtions- Textbooks
KW  - Trigonometry- Textbooks
KW  - Algebra- Textbooks
N1  - Includes index
ER  -