00482pamaa2200169 4500 0000012107 20100424090000.0 0133815757 512.13 VAR QA155.7 VAR 1996 Varberg Algebra and trigonometry : a graphing approach Dale E. Varberg and Thomas D. Varberg. New Jersey: Prentice Hall, 1996. xii, 579p.: 24cm. Trigonometry Algebra Varberg, Thomas D.