TY  - BOOK
AU  - Ratti,J.S.
AU  - McWaters,Marcus
TI  - Precalculus: a unit circle approach 
SN  - 0321537092 (student ed.)
AV  - QA331.R3 2010 
PY  - 2010///
CY  - Boston
PB  - Pearson
KW  - Functions
KW  - Trigonometry
KW  - Algebra
N1  - Includes index
ER  -