Trigonometry Question Preview

Q-ID: 76215
A-ID:

The depth of water, `D` metres, in a harbour, `h` hours after midnight, is given by the formula:

`D = 3 + 2sin(30h)`

A boat can only leave the harbour when the water depth is greater than `4` metres.

What is the last time in the day that the boat can leave?

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