The height, h, in metres, of the tide in a given location on a given day at t hours after midnight can be modelled using the sinusoidal function h(t)= 5 sin 30 (t-5) + 7
(A) find max and min value for depth of water.
(B) what time is high tide? What time is low tide?
(C) what is the depth of the water at 9:00am?
The Attempt at a Solution
(A) The maximum would be 12 because 5 + 7. The minimum would be 2 because 7-5.
However when it comes to questions b and c I have no idea what to do or where to even begin.