Precalculus was developed to create a program that seamlessly align with how teachers teach and fully supports student learning.Cynthia Young�s goal was to create an intuitive, supportive product for students without sacrificing the rigor needed for true conceptual understanding and preparation for Calculus. Precalculus helps bridge the gap between in-class work and homework by mirroring the instructor voice outside the classroom through pedagogical features. Additional ISBNs 9781119275121|9781119412533, 1119275121|1119412536Precalculus, Enhanced 3rd Edition by Cynthia Y. Young and Publisher Wiley. ISBN: 9781119339519, 1119339510. The print version of this textbook is ISBN: 9781119275121, 1119275121.