A Student-Centered Textbook 154 Pages and 1,000+ Total Exercises - Step-by-Step Guided Lessons + Answer Key - Encourages Thinking & Exploring - Supports Self-Paced Learning Book 5 of 6 in the series, this textbook supports both classroom learning and independent study, empowering students to learn at their pace, whether working collaboratively or individually. The author makes each concept easy to understand and actively engages students in a step-by-step process of building genuine understanding, rather than memorizing formulas without knowing why they work. With careful pacing, clear explanations, and a detailed answer key for timely feedback and helpful guidance, the uniquely scaffolded approach allows students to learn math anywhere, at school or at home. Written by a teacher with over 20 years of experience, each feature is designed to benefit students. Published as a 6-book series instead of a single textbook, students feel a sense of achievement when they finish each book, making learning feel less intimidating. Each lightweight book has 2 parts. The first half uses small steps to guide students through the process of constructing each concept, while the second half provides additional practice to reinforce learning and improve retention. Every section includes an answer key to provide teacher-like feedback that helps students keep moving forward. This curriculum is named Summit Math to reflect the author's belief that learning is like hiking. Anyone can reach the summit, at their own pace, if they keep taking small steps. Book 5 includes 2 Units, listed below. Unit 9: Radians, Degrees & Unit Circle Trigonometry Scenarios Involving Sine, Cosine & Tangent - Angles in Degrees & Radians - Negative Angles - Coterminal Angles - Reference Angles - Common Sine & Cosine Ratios - Building the Unit Circle - Common Tangent Ratios - Three Ways to Define the Tangent Ratio - Reciprocal Trig Ratios - Non-Unit Circle Ratios Unit 10: Trigonometric Equations & Identities Reviewing Common Unit Circle Ratios - Simple Trig Equations - Advanced Trig Equations - Simple Trig Equations: Non-Unit Circle Ratios - General Solutions of Trig Equations - Proving Trigonometric Identities - Reciprocal & Quotient Identities - Strategies for Proving Identities - The 9 Pythagorean Identities - Applying Strategies to Prove Identities