Trigonometry

Katherine Yoshiwara · Trigonometry, XYZ web edition.Free to read, no login

  1. 1 Triangles and Circles
  2. 2 The Trigonometric Ratios
  3. 3 Laws of Sines and Cosines
  4. 4 Trigonometric Functions
  5. 5 Equations and Identities
  6. 6 Radians
  7. 7 Circular Functions
  8. 8 More Functions and Identities
  9. 9 Vectors
  10. 10 Polar Coordinates and Complex Numbers
  11. 11 GNU Free Documentation License
  12. 12 Glossary

Trigonometry by Katherine Yoshiwara (yoshiwarabooks.org), GNU Free Documentation License 1.2 or later. Adapted for the XYZ HTML edition with the authors' permission (recorded 2026-07-04).

License: GFDL-1.2-or-later. Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.

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