Tenny's trig

This picture was found in class. The detail of the picture shows alot about trig functions. I chosen this picture because it was very interesting,and it attracted my eye. You know what i realized in Mr.k's classroom ,every picture that you saw on the wall ,allof it deal with math. I guess when he was teaching , i wanted to look at the time, but all of a sudden, i saw the cosine/sine function graph. During that time i was looking for a picture too.

Done