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The displacement y of a particle executing periodic motion is given by $y = 4{\cos ^2}(t/2)\sin (1000t)$. This expression may be considered to be a result of the superposition of ........... independent harmonic motions
  • A$2$
  • B$3$
  • C$4$
  • D$5$
IIT 1992, Diffcult
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