ધારો કે $S = \{ x : \cos^{-1} x = \pi + \sin^{-1} x + \sin^{-1}(2x + 1) \}$. તો $\sum_{x \in S} (2x - 1)^2$ ની કિંમત . . . . . . છે.

  • A
    $5$
  • B
    $6$
  • C
    $7$
  • D
    $8$

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સમીકરણ $\cos ^{-1}(1-x)-2 \cos ^{-1} x=\frac{\pi}{2}$ ના

$x$ ના કેટલા ભિન્ન મૂલ્યો માટે સમીકરણ $\sin [2 \cos^{-1} \cot (2 \tan^{-1} x)] = 0$ સાચું છે?

સાબિત કરો કે $\sin ^{-1} \frac{12}{13}+\cos ^{-1} \frac{4}{5}+\tan ^{-1} \frac{63}{16}=\pi$

જો $x=\sin \left(2 \tan ^{-1} 2\right)$ અને $y=\sin \left(\frac{1}{2} \tan ^{-1} \frac{4}{3}\right)$,હોય તો

$\sec ^2(\tan ^{-1} 3) + \operatorname{cosec}^2(\cot ^{-1} 3) = $ . . . . . . .

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