$e^{\log (\cosh^{-1} 2)}$ का मान क्या है?

  • A
    $\log (2-\sqrt{3})$
  • B
    $\log (\sqrt{3}-2)$
  • C
    $\log (2+\sqrt{3})$
  • D
    $\log (2+\sqrt{5})$

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$\cos ^{-1}\left(\cot \left(\frac{\pi}{2}\right)\right)+\cos ^{-1}\left(\sin \left(\frac{2 \pi}{3}\right)\right)$ का मान है:

$\tan \left( \frac{1}{2} \cos^{-1} \left( \frac{\sqrt{5}}{3} \right) \right)$ का मान ज्ञात कीजिए।

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