$\cos \left(22 \frac{1}{2}\right)^{\circ}$ का मान क्या है?

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

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