Digital library
Textbooks, references and open learning resources.

External
Math C180: Calculus I
Michael Everett · Coastline College
In the contents: 4.08: Parametric Equations · 4.09: Derivatives of Parametric Equations · 4.11: Linear Approximations and Differentials

External
Elementary Calculus 2e
Michael Corral · Schoolcraft College
In the contents: 03: Topics in Differential Calculus · 3.06: Differentials · 7.06: Parametric Equations

External
Interactive Calculus Q2
Larry Green · Lake_Tahoe_Community_College
In the contents: 04: Introduction to Differential Equations · 4.01: Prelude to Differential Equations · 4.02: Basics of Differential Equations

External
Introduction to Quantum Mechanics
Delmar Larsen · University of California, Davis
In the contents: 2.3: Oscillatory Solutions to Differential Equations · 8.03: Hartree-Fock Equations Are Solved by the Self-Consistent Field Method

External
Math C280: Calculus III
Chau D. Tran · coastline
In the contents: 1.05: Equations of Lines and Planes in Space · 1.5E: Exercises for Equations of Lines and Planes in Space · 3.05: Tangent Planes Linear Approximations and the Total Differential