The path of a point on the rim of a wheel of radius a that is rolling on a horizontal surface has parametric equations x = a(t - sin t), y = a (1 - cos t), for t ? 0. Estimate the value of a for the cycloid curve.Cycloid: x = 3(t - sin t), y= 3(1 - cos t), 0 ? t ? 6?
A. a = 3?
B. a = 
C. a = 1
D. a = 3
Answer: D
Mathematics
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A. 30
B. 16
C. -15, 15
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A. 
= 
B. 
= 
C. 
= 
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= 
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Find the exact value. If the value of the function is not defined, write undefined.cos 
A. -1
B. 0
C. 
D. Undefined
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