જો $\tan A < 0$ અને $\tan 2A = -\frac{4}{3}$ હોય,તો $\cos 6A =$

  • A
    $\frac{117}{125}$
  • B
    $-\frac{117}{125}$
  • C
    $\frac{120}{169}$
  • D
    $-\frac{120}{169}$

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