$\cos (\tan ^{ - 1}(\tan 2))$ ની કિંમત શોધો.

  • A
    $\frac{1}{\sqrt{5}}$
  • B
    $-\frac{1}{\sqrt{5}}$
  • C
    $\cos 2$
  • D
    $-\cos 2$

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જો $\cos (2\sin ^{ - 1}x) = \frac{1}{9}$ હોય,તો $x = $

જો $y = \sin^{-1}\left(\frac{19}{20}x\right) + \cos^{-1}\left(\frac{19}{20}x\right)$ હોય,તો $\frac{dy}{dx} = $

સાબિત કરો કે $2 \sin ^{-1} \frac{3}{5} = \tan ^{-1} \frac{24}{7}$.

સમીકરણ $\tan ^{-1} x+\tan ^{-1} 2 x=\frac{\pi}{4}$ નું સમાધાન કરતી $x$ ની વાસ્તવિક કિંમત છે

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