3-1: Two-Sided Spectrum
3-2: Spectrum of a Product
3-3: Time-Domain Plot of a Beat Note
3-4: Decreasing fΔ
3-5: Amplitude Modulation
3-6: Calculating f0
3-7: Fourier Series without Integration
3-8: Synthesize a Chirp Formula
McClellan, Schafer, and Yoder, Signal Processing First, ISBN 0-13-065562-7.