$|x| \geq 1$ के लिए $\cos \left(\sec ^{-1} x+\csc ^{-1} x\right)$ का मान ज्ञात कीजिए।

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

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