ForgEd Math · Volume II: Precalculus & Trigonometry
Official ForgEd Math Series Volume II — sixteen-chapter interactive precalculus and trigonometry textbook with chapter quizzes, plus a thirteen-chapter PDF download of the print manuscript.
ForgEd Math Series · first edition. Read the full interactive textbook below (sections, chapter quizzes, course review). The official PDF matches the print manuscript — download it for offline study or when you want the exact book layout.
Course videos
Watch the introduction (with learners studying from home), then study chapter by chapter. Midterm and final sessions teach the material with practice questions you must answer to continue — those checkpoints are not graded.
Narration · Professor Ryan · British English
ForgEd · Introduction
ForgEd Math · Volume II: Precalculus & Trigonometry · Course introduction
How this course is organized, how to study with the textbook and quizzes, and what you will be able to do when you finish.
Watch the intro or continue when you are ready. Chapter 1 stays locked until you continue.
Complete each chapter's 5-question quiz (instant feedback), then pass the 10-question course review, then the 20-question final exam (score at the end) to earn course completion on your profile.
ForgEd courses are for general education and logical foundations. They do not replace professional certification, licensure, or cert-level competence.
Skills you will gain
- Trigonometry
- Identities & Equations
- Polar & Parametric
- Calculus Preparation
Chapters
- 1
Chapter 1: Functions and Their Graphs (Review and Extension)
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- 2
Chapter 2: Polynomial and Rational Functions
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- 3
Chapter 3: Exponential and Logarithmic Functions (Review)
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- 4
Chapter 4: Angles and the Unit Circle
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- 5
Chapter 5: Right Triangle Trigonometry
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- 6
Chapter 6: Trigonometric Functions of Any Angle
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- 7
Chapter 7: Graphs of Sine and Cosine
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- 8
Chapter 8: Graphs of Other Trig Functions
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- 9
Chapter 9: Inverse Trigonometric Functions
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- 10
Chapter 10: Trigonometric Identities
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- 11
Chapter 11: Trigonometric Equations
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- 12
Chapter 12: Law of Sines and Law of Cosines
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- 13
Chapter 13: Polar Coordinates and Complex Numbers
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- 14
Chapter 14: Vectors and Parametric Equations
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- 15
Chapter 15: Conic Sections
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- 16
Chapter 16: Sequences, Series, and Limits Preview
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