Trigonometry basics
- Khan Academy - Right Triangle Trig Video Tutorials and Practice Quiz
- Visual Explanation of Sine, Cosine and Tangent
- Using Trig to Find a Missing Angle of a Right Triangle - Explanation, Examples, and Practice Problems
- Explanation of Trig Functions with Interactive Visual Guide
- Trigonometry Explained by the Unit Circle Quadrants
- Inverse Trig Practice Quiz
- Trig and the Unit Circle Practice Quiz
- Reciprocal Trig Functions - Khan Academy Video Tutorial
- Reciprocal Trig Functions - Practice Quiz
- Using your TI Graphing Calculator to Solve Trig Problems
- Trig Ratios - NASA - Explanation and Example Problems
- Right Triangle Trig - Jamboard Note Sheet
Angles of Elevation and Depression
- Word Problem Examples with Step-by-Step Solutions
- Angles of Elevation/Depression Explanations and Example Problems
- Angles of Elevation and Depression - Video Tutorial
- Visual Description of Angles of Elevation and Depression with Example Problems
- Angles of Elevation and Depression Word Problems Explanation and Practice Problems