यदि ${\rm{cosec}}\theta = \frac{{p + q}}{{p - q}},$ तब $\cot \,\left( {\frac{\pi }{4} + \frac{\theta }{2}} \right) = $
यदि ${\rm{cosec}}\theta = \frac{{p + q}}{{p - q}},$ तब $\cot \,\left( {\frac{\pi }{4} + \frac{\theta }{2}} \right) = $
- A
$\sqrt {\frac{p}{q}} $
- B
$\sqrt {\frac{q}{p}} $
- C
$\sqrt {pq} $
- D
$pq$
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