જો $2\tan^{-1}(\cos x) = \tan^{-1}(2\csc x)$ હોય,તો $x =$

  • A
    $\frac{3\pi}{4}$
  • B
    $\frac{\pi}{4}$
  • C
    $\frac{\pi}{3}$
  • D
    આમાંથી કોઈ નહીં

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