If $\tan x = \frac{b}{a},$ then $\sqrt {\frac{{a + b}}{{a - b}}} + \sqrt {\frac{{a - b}}{{a + b}}} = $
If $\tan x = \frac{b}{a},$ then $\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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