Our definition of wave length is trough - trough. In this case, the professor told us that frequency was the time period for one wave cycle in seconds. We never had to verify its accuracy because it was given to us on a chart.
ok...so... if you hve a wave ht, and pi... how does freq come into play? as how long it takes to 'draw' a circle has no bearing on the corralation of piRsquared?
in my mind freq would be used to calculate the speed of the wave..if the wave was X feet long, and lasted X freq. then (x*fre)/ converted to mph etc...