Repeat Sine and Cosine Curves
This is a continuation of the 'Start Sine and Cosine Curves'
animation. This animated image traces the sine and cosine
curves simultaneously with the blue and red lifters. The
lifters are moved by the blue and red pins, which are
separated by 90o. The sine curve is traced by the
blue lifter. It is moved by the blue pin on the front side of
the yellow parent gear while the blue center point traces
against a transparent screen hanging from the front side of
the green rack. The cosine curve is traced by the red lifter.
It is moved by the red pin on the back side of the yellow
parent gear while the red center point traces against another
transparent screen hanging from the back side of the green
rack. A side view of the parent gear and lifters is included
to illustrate how the mechanism operates.