Graph of Cosine

Recall the cofunction identity: We can use this to relate the graphs of sine and cosine. Starting with
  1.  Check the box next to Sine to see a portion of the sine curve.
  2.  (Reflection across the y-axi) Use the slider to show it
  3.  (Translation right  units) Use the slider
We can see that the final outcome is the same as the cosine curve (check by switching it on).