જો $\frac{\pi}{2} \leq x \leq \frac{3 \pi}{4}$ હોય,તો $\cos ^{-1}\left(\frac{12}{13} \cos x+\frac{5}{13} \sin x\right)$ ની કિંમત શોધો.

  • A
    $x-\tan ^{-1} \frac{4}{3}$
  • B
    $x-\tan ^{-1} \frac{5}{12}$
  • C
    $x+\tan ^{-1} \frac{4}{5}$
  • D
    $x+\tan ^{-1} \frac{5}{12}$

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