The force $F$ is given in terms of time $t$ and displacement $x$ by the equation $F = A \cos(Bx) + C \sin(Dt).$ The dimensional formula of $D/B$ is

  • A
    $M^0 L^0 T^0$
  • B
    $M^0 L^0 T^{-1}$
  • C
    $M^0 L^{-1} T^0$
  • D
    $M^0 L^1 T^{-1}$

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