$\cot \left(\operatorname{cosec}^{-1} \frac{5}{3}+\tan ^{-1} \frac{2}{3}\right)$ નું મૂલ્ય શોધો.

  • A
    $\frac{5}{17}$
  • B
    $\frac{6}{17}$
  • C
    $\frac{3}{17}$
  • D
    $\frac{4}{17}$

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$\sinh^{-1}\left(\frac{x}{\sqrt{1-x^2}}\right)$ કોના બરાબર છે?

જો $\sin ^{-1} x+\sin ^{-1} y+\sin ^{-1} z=\frac{3 \pi}{2}$ હોય, તો $x^{9}+y^{9}+z^{9}-\frac{1}{x^{9} y^{9} z^{9}}$ ની કિંમત કેટલી થાય?

નીચેના વિધાનો ધ્યાનમાં લો:
વિધાન $(A)$: $x \in \mathbb{R}-\{1\}$ માટે, $\frac{d}{dx}\left(\tan^{-1}\left(\frac{1+x}{1-x}\right)\right) = \frac{d}{dx}\left(\tan^{-1} x\right)$.
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સાચો જવાબ છે:

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

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