જો $29 \tan \theta = 31$ હોય,તો $\frac{1+2 \sin \theta \cos \theta}{1-2 \sin \theta \cos \theta}$ નું મૂલ્ય કેટલું થાય?

  • A
    $540$
  • B
    $490$
  • C
    $810$
  • D
    $900$

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