Application (12 Markel 1. The depth of the ocean can be toddled by the function d(2) = 4 + sin y . whered is the depth of water in metres and / is the time in hours, where 0 51 5 24 and ? = 0 represents midnight. in. Determine the depth of the ocean when 1=3h. [2 Marks] b. Determine the time when the depth of water is 3 m. [2 Marks] 2. Determine a simplified expression of cos* x - sin * x [4 Marks] COs 2x 6cos x - cos x = 1 Solve the following trigonometric equation for x, where 0