यदि $\frac{2 \sin \alpha}{1+\cos \alpha+\sin \alpha}=x$ है,तो $\frac{1-\cos \alpha-\sin \alpha}{\cos \alpha}=$

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

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