જો $\cos x + \sin x = \frac{1}{2}$ અને $0 < x < \pi$ હોય,તો $\tan x =$

  • A
    $\frac{4+\sqrt{7}}{3}$
  • B
    $\frac{4-\sqrt{7}}{3}$
  • C
    $\frac{-4+\sqrt{7}}{3}$
  • D
    $\frac{-4-\sqrt{7}}{3}$

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