$\frac{{\sqrt 2 - \sin \alpha - \cos \alpha }}{{\sin \alpha - \cos \alpha }} = $

  • A

    $\sec \left( {\frac{\alpha }{2} - \frac{\pi }{8}} \right)$

  • B

    $\cos \left( {\frac{\pi }{8} - \frac{\alpha }{2}} \right)$

  • C

    $\tan \left( {\frac{\alpha }{2} - \frac{\pi }{8}} \right)$

  • D

    $\cot \left( {\frac{\alpha }{2} - \frac{\pi }{2}} \right)$

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