If $\tan (\pi \cos \theta) = \cot (\pi \sin \theta)$,then $\sin \left(\frac{\pi}{4} + \theta\right) =$

  • A
    $\frac{1}{2}$
  • B
    $\frac{1}{\sqrt{2}}$
  • C
    $\frac{1}{4}$
  • D
    $\frac{1}{2 \sqrt{2}}$

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