જો $y = \cos^{-1}(\cos(|x| - f(x)))$,જ્યાં $f(x) = \begin{cases} 1, & \text{જો } x > 0 \\ -1, & \text{જો } x < 0 \\ 0, & \text{જો } x = 0 \end{cases}$,હોય તો $\left. \frac{dy}{dx} \right|_{x = \frac{5\pi}{4}}$ ની કિંમત શોધો.

  • A
    $-1$
  • B
    $1$
  • C
    $0$
  • D
    અનિર્ધારિત

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