$\cos \left[\cos ^{-1}\left(-\frac{1}{7}\right)+\sin ^{-1}\left(-\frac{1}{7}\right)\right]$ ની કિંમત શોધો.

  • A
    $-\frac{1}{3}$
  • B
    $0$
  • C
    $\frac{1}{3}$
  • D
    $\frac{4}{9}$

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