જો $\cos ^{-1} x+\cos ^{-1} y+\cos ^{-1} z=3 \pi$ હોય,તો $x^{2025}+x^{2026}+x^{2027}$ ની કિંમત શોધો.

  • A
    $-1$
  • B
    $0$
  • C
    $1$
  • D
    $3$

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$2{\tan ^{ - 1}}\left[ {\sqrt {\frac{{a - b}}{{a + b}}} \tan \frac{\theta }{2}} \right] = $

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

જો $2 \tan^{-1}(\cos x) = \tan^{-1}(2 \operatorname{cosec} x)$ હોય,તો $x$ ની કિંમત શોધો.

જો $x \geq 1$ હોય,તો $2 \tan^{-1} x + \sin^{-1} (\frac{2x}{1+x^2})$ ની કિંમત શું થાય?

$\tan ^{-1}\left(\frac{1}{3}\right)+\tan ^{-1}\left(\frac{1}{5}\right)+\tan ^{-1}\left(\frac{1}{7}\right)+\tan ^{-1}\left(\frac{1}{8}\right)$ ની કિંમત શોધો.

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