જો $\tan ^{-1}\left(\frac{x}{2}\right)+\tan ^{-1}\left(\frac{y}{2}\right)+\tan ^{-1}\left(\frac{z}{2}\right)=\frac{\pi}{2}$ હોય,તો $x y+y z+z x=$

  • A
    $0$
  • B
    $2$
  • C
    $-1$
  • D
    $4$

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Similar Questions

જો કોઈ $x \in (-1, 1)$ માટે $\sin^{-1} x = \frac{\pi}{5}$ હોય,તો $\cos^{-1} x$ ની કિંમત શોધો.

$\cos \left(\cos ^{-1} \frac{1}{3}+\cos ^{-1} \frac{1}{5}\right)+\cos \left(\sin ^{-1} \frac{1}{3}+\sin ^{-1} \frac{1}{5}\right) =$ . . . . . . .

કિંમત શોધો: ${\tan ^{ - 1}}x + {\cot ^{ - 1}}(x + 1)$

$\tan \left(2 \tan^{-1}\left(\frac{1}{3}\right)+\tan^{-1}\left(\frac{1}{7}\right)\right) = $

$\tan ^{-1} 2+\tan ^{-1} 3=$

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