Introduction to Trigonometry 001
- Barry Desborough
Here is a red line turning about one of its ends. The other end turns through a circle. On the right is a side-on view of the red line, and a trace of the height of the line as it turns. The trace forms a wave.
Click on the pause/play control at the bottom-left. See if you can pause at 0°, 90°, 180° and 270°.