समीकरण $\cos x - x + \frac{1}{2} = 0$ का एक मूल किस अंतराल में स्थित है?

  • A
    $[0, \frac{\pi}{2}]$
  • B
    $[-\frac{\pi}{2}, 0]$
  • C
    $[\frac{\pi}{2}, \pi]$
  • D
    $[\pi, \frac{3\pi}{2}]$

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