જો $2 \operatorname{Tanh}^{-1} x = \operatorname{Sinh}^{-1}\left(\frac{4}{3}\right)$ હોય,તો $\operatorname{Cosh}^{-1}\left(\frac{1}{x}\right) = $

  • A
    $\log (\sqrt{2}+1)$
  • B
    $\log (\sqrt{2}-1)$
  • C
    $\log (2+\sqrt{3})$
  • D
    $\log (2-\sqrt{3})$

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ધારો કે $a \neq 0$ માટે $S_a(x) = \operatorname{Sec}^{-1}\left(\frac{x}{a}\right) + \operatorname{Sec}^{-1}(a)$ છે. જો $a \neq b$ માટે $S_a(x) = S_b(x)$ હોય,તો $x =$

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