Ross, Debra, 1958- Master math : trigonometry / Trigonometry Debra Anne Ross. - Boston, MA : Course Technology PTR, c2010. - viii, 420 p. : ill. ; 23 cm. ISBN: 9781598639858 (pbk.) 1598639854 (pbk.) Subjects--Topical Terms: Trigonometry.Mathematics. Dewey Class. No.: 516.24 / ROS 2010