A sketch to show how the sine, cosine and tangent values on the unit circle are sketched in order to graph trig values. Follow the directions below the applet to help guide you through this activity.
What do you notice about the values of sine on the unit circle and the graph of sine? How do we create the sine graph using the unit circle?
What about cosine? How do we create the cosine graph using the unit circle?
What do you notice about the graph of tangent that is different from the graph of sine and cosine?
What questions do you have about the graphs above or about the unit circle?