यदि $7 \sin ^{2} \theta+3 \cos ^{2} \theta=4$ है,तो $\tan \theta=$

  • A
    $\pm \frac{1}{3}$
  • B
    $\pm \frac{1}{2}$
  • C
    $\pm \frac{1}{\sqrt{3}}$
  • D
    $\pm \frac{1}{\sqrt{2}}$

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