Larson, Ron, 1941- Trigonometry / Roland E. Larson, Robert P. Hostetler ; with the assistance of David E. Heyd. - Heath, c1985. - xvi, 322, 56 p. : ill. (some col.) ; 24 cm. Includes index. ISBN: 0669086118 LCCN: 84080506 Subjects--Topical Terms: Trigonometry. Subjects--Index Terms: მათემატიკა ტრიგონომეტრია LC Class. No.: QA531 / .L37 1985 Dewey Class. No.: 516.2/4 Universal Decimal Class. No.: 514.116