2.
Trigonometry: An Analytic Approach - Irving Drooyan
by Drooyan, Irving, Hadel, Wal...
ISBN: 9780023306501
3.
8.
Student solution key [for] essentials of trigonometry [by] Irving Drooyan, Walter Hadel, Cha...
by Walter Hadel
ISBN: 9780023302800
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Essentials of Trigonometry - Irving Drooyan - Paperback
by Drooyan, Irving, Hadel, Wal...
ISBN: 9780023306204
List Price: $26.00