योगफल ज्ञात कीजिए: $\sum_{k=1}^{2026} \sin^{-1}(\cos \frac{k\pi}{4})$।

  • A
    $-\frac{\pi}{4}$
  • B
    $0$
  • C
    $\frac{\pi}{4}$
  • D
    $\frac{\pi}{2}$

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