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Question Answered step-by-step Step by step solution Step by step solution Image transcription text5. The water depth in a harbour is 18 m at high tide at 2 am and 9 m at low tide. One cycle is completedapproximately every 12 h. a) Find an equation of the water depth, d, as a function of the time, t, hours after hightide using a cosine function. (3 points) b) Draw a graph of the function for 24 h. Then, write an eq… Show more… Show more Math Trigonometry MATH MHF4U Share QuestionEmailCopy link Comments (0)