$\sin \left[ 3 \sin^{-1} \left( \frac{1}{5} \right) \right] = $

  • A
    $71/125$
  • B
    $74/125$
  • C
    $3/5$
  • D
    $1/2$

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$\cos \left[\sin ^{-1}\left(\frac{3}{5}\right)+\cos ^{-1}\left(\frac{12}{13}\right)\right]=$

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સાબિત કરો કે $\cot ^{-1}\left(\frac{\sqrt{1+\sin x}+\sqrt{1-\sin x}}{\sqrt{1+\sin x}-\sqrt{1-\sin x}}\right)=\frac{x}{2}$,જ્યાં $x \in\left(0, \frac{\pi}{4}\right)$.

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$\sin^{-1} \frac{1}{\sqrt{5}} + \cot^{-1} 3$ ની કિંમત શોધો.

જો $|x|>1$ માટે, $\tanh ^{-1}\left(\frac{1}{x}\right)+\operatorname{coth}^{-1}(x)=\log _e(f(x))$ હોય, તો $f(-5)=$

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