Answer:
6 seconds
Explanation:
You want to know the time it takes for one full rotation of a wind turbine blade if the height in metres of the tip is described by ...
H(t) = 52·sin(60°×t) +80
Period
Expressed in terms of the period of rotation T, the argument of the sine function is ...
(360°/T)·t
This tells us that ...
360°/T = 60°
T = 360°/60° = 6
The time it takes for one full revolution is 6 seconds.
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