જો $\tan \theta = \frac{\cos 25^{\circ} + \sin 25^{\circ}}{\cos 25^{\circ} - \sin 25^{\circ}}$ અને $\theta$ ત્રીજા ચરણમાં હોય,તો $\theta =$ ($^{\circ}$ માં)

  • A
    $200$
  • B
    $205$
  • C
    $225$
  • D
    $250$

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$\cos A + \cos (240^\circ + A) + \cos (240^\circ - A) = $

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