यदि $\tan x = \frac{b}{a}$ है,तो $\sqrt {\frac{{a + b}}{{a - b}}} + \sqrt {\frac{{a - b}}{{a + b}}} = $

  • A
    $\frac{{2\sin x}}{{\sqrt {\sin 2x} }}$
  • B
    $\frac{{2\cos x}}{{\sqrt {\cos 2x} }}$
  • C
    $\frac{{2\cos x}}{{\sqrt {\sin 2x} }}$
  • D
    $\frac{{2\sin x}}{{\sqrt {\cos 2x} }}$

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