Question

sketch a graph of the following - At midnight the water at a particular beach is at high tide. At the same time a gauge at the end of a pier reads 10 feet. Low tide is reached at 6 AM when the gauge reads 4ft.

Answer 1

            In the attachment is a graph of the cosine function that represents changing of the tide.
            y max = 10 ft  at midnight
            y min = 5 ft at 6 AM