જો $\pi \le x \le 2\pi $ હોય,તો ${\cos ^{ - 1}}(\cos x)$ કોના બરાબર થાય?

  • A
    $x$
  • B
    $-x$
  • C
    $2\pi + x$
  • D
    $2\pi - x$

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જો $\tan ^{-1} x+\tan ^{-1} y+\tan ^{-1} z=\frac{\pi}{2}$ હોય, તો $1-x y-y z-z x$ ની કિંમત શોધો.

જો $\frac{\pi}{4} + \sum_{p=1}^{11} \tan^{-1} \left(\frac{2^{p-1}}{1+2^{2p-1}}\right) = \tan^{-1} \alpha$ હોય, તો $\tan \alpha$ ની કિંમત . . . . . . થાય.

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જો ${\tan ^{ - 1}}\frac{{1 - x}}{{1 + x}} = \frac{1}{2}{\tan ^{ - 1}}x$ હોય,તો $x = $

જો $\cot^{-1}[(\cos \alpha)^{1/2}] - \tan^{-1}[(\cos \alpha)^{1/2}] = x$ હોય,તો $\sin x = $

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