$\frac{\cos 9^\circ + \sin 9^\circ}{\cos 9^\circ - \sin 9^\circ} = $

  • A
    $\tan 54^\circ$
  • B
    $\tan 36^\circ$
  • C
    $\tan 18^\circ$
  • D
    આમાંથી કોઈ નહીં

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