Find the value of $$\sqrt{\cfrac{1 - \tan A}{1 + \tan A}}$$.

A

$$\sqrt{\cfrac{1 + \sin 2A}{\cos 2A}}$$

B

$$\sqrt{\cfrac{1 - \sin 2A}{\cos 2A}}$$

C

$$\sqrt{\cfrac{1 + \sin 2A}{\cos A}}$$

D

$$\sqrt{\cfrac{1 - \sin 2A}{\cos A}}$$