Trigonometry

Six units. Each lesson: plain words, a picture, the why, the rule, how, a worked example, the trap.

No unit is live yet. The sample lesson on the front page shows the shape every lesson has: read it.

1. Angles and their measure (being written)
2. Trigonometric functions (being written)
3. Properties of the trigonometric functions (being written)
4. Graphs of sine and cosine (being written)
5. Graphs of the other four functions (being written)
6. Sinusoidal functions (being written)