यदि $\cos A = \frac{3}{4}$, तब $32\sin \frac{A}{2}\cos \frac{5}{2}A = $
यदि $\cos A = \frac{3}{4}$, तब $32\sin \frac{A}{2}\cos \frac{5}{2}A = $
- A
$\sqrt 7 $
- B
$ - \sqrt 7 $
- C
$7$
- D
$-7$
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