Trigonometry Doodles turns angles, waves, and triangles into a satisfyingly creative brain workout. Designed for smart downtime and focused study alike, this book blends clean, classroom-ready trig problems with playful doodle cues on every page, so you practice identities and solve triangles while sketching tiny gondolas, lighthouse beams, kites, and compass roses. Difficulty lands at high-school level: approachable, varied, and sprinkled with a few spicy challenges to keep you sharp. Every puzzle lives on its own page with space for long-hand work, and a concise answer key lets you check your thinking without spoilers. What’s inside 100 carefully crafted puzzles - One-puzzle-per-page layout with generous workspace and a unique doodle cue for each prompt. - A clear, concise answer key at the back for quick self-checks. Skills you’ll build Radians & degrees, reference angles, and the unit circle. - Identities (Pythagorean, sum/difference, double/half-angle), algebraic simplifications, and proofs. - Solving trig equations on [0, 2π) and working with inverse trig. - Graphs and modeling: amplitude, period, phase/vertical shifts, sinusoid fitting. - Right-triangle applications, angles of elevation/depression. - Law of Sines & Cosines, ambiguous SSA cases, triangle area with ½ab sin C. - Arcs, sectors, and real-world bearings/displacement problems. Why it works Structured variety: conceptual, computational, and applied problems keep you engaged. - Built-in mindfulness: light doodling reduces anxiety and boosts recall. - “Meeting-friendly:” quick setups that respect your time but reward good reasoning. Perfect for High-school students, homeschoolers, tutors, and math clubs. - Teachers seeking bell-ringers, sub plans, or enrichment pages. - Busy grown-ups who like to “look busy” while actually getting sharper. Answer key included. Sharpen a pencil, trace a few curves, and let the math (and the doodles) carry you to clarity.