$2 \tan^{-1} \frac{1}{2} + \tan^{-1} \frac{1}{7}$ ની કિંમત શોધો.

  • A
    $\tan^{-1} \left( \frac{17}{31} \right)$
  • B
    $\tan^{-1} \left( \frac{19}{31} \right)$
  • C
    $\tan^{-1} \left( \frac{31}{17} \right)$
  • D
    $\tan^{-1} \left( \frac{31}{19} \right)$

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જો $\sec^{-1} x = \csc^{-1} y$ હોય,તો $\cos^{-1} \frac{1}{x} + \cos^{-1} \frac{1}{y} = $

જો $k \le \sin^{-1}x + \cos^{-1}x + \tan^{-1}x \le K$ હોય,તો

જો $0 \leq x \leq \frac{1}{2}$ હોય,તો $\tan \left[\sin ^{-1}\left\{\frac{x}{\sqrt{2}}+\frac{\sqrt{1-x^{2}}}{\sqrt{2}}\right\}-\sin ^{-1} x\right]$ ની કિંમત શોધો.

જો $\cot^{-1} \alpha + \cot^{-1} \beta = \cot^{-1} x$ હોય,તો $x = $

જો $0 < x < 1$ હોય,તો $\sqrt{1+x^2} [\{x \cos (\cot ^{-1} x)+\sin (\cot ^{-1} x)\}^2-1]^{\frac{1}{2}}$ ની કિંમત શોધો.

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