मान लीजिए $0 < x < \frac{\pi }{4}.$ तब $\sec 2x - \tan 2x = $

  • A
    $\tan \left( x - \frac{\pi }{4} \right)$
  • B
    $\tan \left( \frac{\pi }{4} - x \right)$
  • C
    $\tan \left( x + \frac{\pi }{4} \right)$
  • D
    $\tan^2 \left( x + \frac{\pi }{4} \right)$

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