જો $x \in \left(0, \frac{\pi}{2}\right)$ માટે,$\log_{10} \sin x + \log_{10} \cos x = -1$ અને $\log_{10}(\sin x + \cos x) = \frac{1}{2}(\log_{10} n - 1)$,$n > 0$ હોય,તો $n$ ની કિંમત શોધો.

  • A
    $20$
  • B
    $12$
  • C
    $9$
  • D
    $16$

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