Sullivan, Michael 1942- Trigonometry a unit circle approach Michael Sullivan. - 7th.ed. - Upper Saddle River, N.J. Pearson Prentice Hall c2005. - 1v. (various pagings) ill., (some col.) 26 cm. Includes bibliographical references and index. ISBN: 0131431110 Subjects--Topical Terms: GENTrigonometry.