यदि $\cot \theta = \frac{a}{b}$ है,तो $\frac{\cos \theta - \sin \theta}{\cos \theta + \sin \theta} = \ldots$

  • A
    $\frac{a}{b}$
  • B
    $\frac{b}{a}$
  • C
    $\frac{a+b}{a-b}$
  • D
    $\frac{a-b}{a+b}$

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