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[Maximum mark: 5]
The following diagram shows a ferris wheel, which rotates at a constant rate.
The height h, in meters, of point P above the ground is given by h(t)=20cos(bt)+23, where t is the time in minutes.
Find
the distance from the lowest point on the wheel to the ground,
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- [2]
the diameter of the wheel.
The wheel makes 4 revolutions in an hour.
- [3]
Find the value of b.
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