A particle moves in the $x-y$ plane according to equation $\overrightarrow r  = (\widehat i + 2\widehat j)\, A \, \cos \omega t$. The  motion of the particle is 
  • A
    On a straight line
  • B
    Simple harmonic
  • C
    Periodic
  • D
    All of these
Diffcult
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