$\sinh ^{-1} 2 + \sinh ^{-1} 3 = x \Rightarrow \cosh x$ ની કિંમત શોધો.

  • A
    $\frac{1}{2}(3 \sqrt{5} + 2 \sqrt{10})$
  • B
    $\frac{1}{2}(3 \sqrt{5} - 2 \sqrt{10})$
  • C
    $\frac{1}{2}(12 + 2 \sqrt{50})$
  • D
    $\frac{1}{2}(12 - 2 \sqrt{50})$

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$\tan 81^{\circ}-\tan 63^{\circ}-\tan 27^{\circ}+\tan 9^{\circ}$ ની કિંમત શોધો.

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