यदि $\tan 20^{\circ} = k$ है,तो $\frac{\tan 250^{\circ} + \tan 340^{\circ}}{\tan 200^{\circ} - \tan 110^{\circ}} = $

  • A
    $\frac{1+k}{1-k}$
  • B
    $\frac{1-k}{1+k}$
  • C
    $\frac{1+k^{2}}{1-k^{2}}$
  • D
    $\frac{1-k^{2}}{1+k^{2}}$

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