on a particular labor day, the high tide in southern california occurs at 7:12 a.m. at that time you measure the water at the end of the santa monica pier to be 11 ft deep. at 1:24 p.m. it is low tide, and you measure the water to be only 7 ft deep. assume the depth of the water is a sinusoid function of time with a period of 1/2 a lunar day, which is about 12 hr 24 min
