$\int_0^{\pi /2} {\left| {\sin \left( {x - \frac{\pi }{4}} \right)} \right|} \,dx$ का सही मूल्यांकन है

  • A
    $2 + \sqrt{2}$
  • B
    $2 - \sqrt{2}$
  • C
    $-2 + \sqrt{2}$
  • D
    $0$

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