TY  - BOOK
AU  - Swokowski, Earl W.
TI  - Precalculus : : functions and graphs 
SN  - 9781305663091
AV  - QA 331.3 .Sw979 2017
PY  - 2017///
CY  - USA
PB  - Cengage Learning
KW  - Functions.
KW  - Algebra -- Graphic methods.
KW  - Trigonometry
N1  - Includes appendix and index
ER  -