જો $4 \cos^{-1} x + \sin^{-1} x = \frac{\pi}{2}$ હોય,તો $x =$ . . . . . . .

  • A
    $1$
  • B
    $\frac{\sqrt{3}}{2}$
  • C
    $0$
  • D
    $\frac{1}{2}$

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જો $\sec ^{-1} \frac{x}{a}-\sec ^{-1} \frac{x}{b}=\sec ^{-1} b-\sec ^{-1} a$ હોય,તો $x$ ની કિંમત શોધો.

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

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

જો $0 < |x| < \sqrt 2$ માટે ${\sin ^{ - 1}}\left( {x - \frac{{{x^2}}}{2} + \frac{{{x^3}}}{4} - \dots} \right) + {\cos ^{ - 1}}\left( {{x^2} - \frac{{{x^4}}}{2} + \frac{{{x^6}}}{4} - \dots} \right) = \frac{\pi }{2}$ હોય,તો $x$ ની કિંમત શોધો.

જો $2 \operatorname{Tanh}^{-1} x = \operatorname{Sinh}^{-1}\left(\frac{4}{3}\right)$ હોય,તો $\operatorname{Cosh}^{-1}\left(\frac{1}{x}\right) = $

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