2: The Exponential Functions Last updated Save as PDF Page ID 9960 Louis Scharf Colorado State University via OpenStax CNX 2.1: Introduction 2.2: The Function e^x 2.3: The Function e^jθ and the Unit Circle 2.4: The Euler and De Moivre Identities 2.5: Roots of Unity and Related Topics 2.6: Second-Order Differential and Difference Equations 2.7: Numerical Experiment (Approximating e^jθ)