Catalog · Real Analysis Lecture 15 of 25 Lecture 15: The Continuity of Sine and Cosine and the Many Discontinuities of Dirichlet's Function ← Previous Lecture 14: Limits of Functions in Terms of Sequences and Continuity Next → Lecture 16: The Min/Max Theorem and Bolzano's Intermediate Value Theorem ✓ Mark complete Materials Transcript (PDF) ↗ transcript