જો ${\tan ^{ - 1}}x + {\tan ^{ - 1}}y + {\tan ^{ - 1}}z = \pi ,$ હોય તો $\frac{1}{{xy}} + \frac{1}{{yz}} + \frac{1}{{zx}} = $

  • A
    $0$
  • B
    $1$
  • C
    $\frac{1}{{xyz}}$
  • D
    $xyz$

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

$x$ ની કઈ કિંમત માટે $\sin(\cot^{-1} (1 + x)) = \cos(\tan^{-1} x)$ થાય?

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જો $(\cos ^{-1} x)^2-(\sin ^{-1} x)^2 > 0$ હોય,તો

$2{\sin ^{ - 1}}\frac{3}{5} + {\cos ^{ - 1}}\frac{{24}}{{25}} = $

$\frac{d}{dx}[\tan^{-1}(\cot x) + \cot^{-1}(\tan x)] = $

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