The displacement \( y \) of a particle executing periodic motion is given by \[ y=4 \cos ^{2}(t ...

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The displacement \( y \) of a particle executing periodic motion is given by
\[
y=4 \cos ^{2}(t / 2) \sin (1000 t)
\]
This expression may be considered to be a result of the superposition of
(A) tWO
(B) three
(C) four
(D) five independent harmonic motions.
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