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(22) The depth of the water in metres in a bay is given by d(t) = 5 + 4.6 sin(0.5t) where t is measured in

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(22) The depth of the water in metres in a bay is given by d(t) = 5 + 4.6 sin(0.5t) where t is measured in hours since midnight. (a) What is the period of the tides? (b) What is the minimum depth of the water? (c) What it the average depth of the water

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