જો $\cos^{-1} x + \cos^{-1} y + \cos^{-1} z = \pi$ હોય,તો

  • A
    $x^2 + y^2 + z^2 + xyz = 0$
  • B
    $x^2 + y^2 + z^2 + 2xyz = 0$
  • C
    $x^2 + y^2 + z^2 + xyz = 1$
  • D
    $x^2 + y^2 + z^2 + 2xyz = 1$

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જો $0 < x < 1$ હોય,તો $\cot ^{-1}\left( \frac{2x^2 - 1}{2x\sqrt{1 - x^2}} \right)$ ની કિંમત શોધો.

જો $\tan ^{-1} x+\tan ^{-1} y=\frac{4 \pi}{5}$ હોય,તો $\cot ^{-1} x+\cot ^{-1} y$ ની કિંમત શોધો.

જો $x=\operatorname{cosec}(\tan ^{-1}(\cos (\cot ^{-1}(\sec (\sin ^{-1} a)))))$,જ્યાં $a \in [0, 1]$,તો નીચેનામાંથી કયું સાચું છે?

જો $y = \sin^{-1} \left( \frac{\sqrt{1+x} + \sqrt{1-x}}{2} \right)$ હોય,તો $\frac{dy}{dx} = $

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

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