TY  - BOOK
AU  - Bittinger,Marvin L.
TI  - Precalculus: graphs & models : : a unit circle approach / 
SN  - 0201616750   
PY  - 2001///.
CY  - Boston
PB  - Addison-Wesley Longman, 
KW  - Algebra
KW  - Graphics methods
KW  - Trigonometry
KW  - Graphic methods
N1  - Includes index
ER  -