# Graphing Sine From the Unit Circle

- Author:
- Andrew Bayliss

- Topic:
- Circle, Sine, Unit Circle

Drag the slider "a" and follow allong as the sine function is graphed on the right. Notice how "a" is the domain value and graphed along the x-axis in blue and the vertical distance to the point on the unit circle is graphed as the range value. That is, sine eats an arc length or distance around the unit circle and spits out the vertical distance to that point.