Trigonometry

Best trigonometry books and tools

Resources for Trigonometry under Mathematics. Pair these picks with articles on thestemprofessor.com.

• Trigonometry (Ron Larson) — Clear unit-circle and identity coverage for precalculus pipelines.
• Precalculus with Unit-Circle Trigonometry (Cohen) — Integrates trig with functions — useful when courses combine topics.
• Schaum's Outline of Trigonometry — Identity sheets and practice sets for exam weeks.
• Trigonometry For Dummies — Readable refresher when a dense textbook feels too formal.
• STEM lab notebook (grid + ruled) — Keep lab notes, units, and sketches in one place.
• Index cards for formulas and terms — Quick review between lectures and problem sets.