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Swing Problem
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A swing moves a distance of 2m from one side to the other
One complete swing movement takes π seconds.
The swing starts at point ‘A’ A
The equation for the distance
d = Cos(4t)
where t = time in seconds &
d = horizontal distance from the centre point B B A
When is the first time the swing is 0.6m from point ‘A’?

2. Home
Swing Problem
End
A swing moves a distance of 2m from one side to the other
One complete swing movement takes π seconds.
The swing starts at point ‘A’ A
0.6m
The equation for the distance
d = Cos(4t)
where t = time in seconds &
d = horizontal distance from the centre point
d = 0.4 B B A
Solve 0.4 = Cos(4t)
4t = Cos-1 0.4
When is the first time the swing is 0.6m from point ‘A’?
4t = 1.159
t = ÷ 4 = 0.29sec (2dp)