The system of equations: $2x \cos^2 \theta + y \sin 2\theta - 2 \sin \theta = 0$,$x \sin 2\theta + 2y \sin^2 \theta = -2 \cos \theta$,and $x \sin \theta - y \cos \theta = 0$,for all values of $\theta$,can:

  • A
    have a unique non-trivial solution
  • B
    not have a solution
  • C
    have infinite solutions
  • D
    have a trivial solution

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