you don't say at what point the wheel starts. Let's say that at t=0 the point of interest at the bottom of the rotation.
Since cos(t) starts at the top, we know right away that the function will look like
y = -cos(kt)
The diameter is 18, so the radius is 9, and we now have
y = -9cos(t)
But, the starting chair is 2m above the ground, rather than 9m below, so
y = -9cos(t) + 11
The period is for seconds, so
y = -9cos(π/2 t) + 11
No sure what to do with the 5 rotations thing. That means the ride lasts 20 seconds. What a rip-off!
As for the sine function, you know that cos(x) = sin(π/2 - x) so fit that in.
Or, consider that an unshifted sine function would start when the loading chair was at axle height.
A carnival ferris wheel that has a diameter of 18m, goes 4 seconds every revolution, there are 5 revolutions, also the ferris wheel is 2m above the ground
Cosine and Sine equation needed
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