Thomas, George.B Finney, Ross.L Calculus and Analytic Geometry - 9 - New Delhi Pearson Education 2008 - P.1228 ISBN: 978-81-7758-325-0 Subjects--Topical Terms: Trigonometric functions Optimisation Limits and Continuity Vectors and Analytic Geometry in Space Dewey Class. No.: 517 T36C