Trig ratios on the unit circle (SOHCAHTOA)
- Author:
- Sam Waterfield
- Topic:
- Circle, Ratios, Unit Circle
Important convention: Angles are always measured anticlockwise from the positive x-axis.
Use the checkboxes and drag the point P around the unit circle to show how the values of the trig functions change. Consider each function carefully in turn. Why is it useful to use the unit circle (radius 1)?