$ \cos \left[2 \sin ^{-1} \frac{3}{4} + \cos ^{-1} \frac{3}{4}\right] $

  • A
    $ \frac{3}{4} $
  • B
    અસ્તિત્વ ધરાવતું નથી
  • C
    $ -\frac{3}{4} $
  • D
    $ \frac{3}{5} $

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$(\tan ^{-1} x)^2+(\cot ^{-1} x)^2=\frac{5 \pi^2}{8} \Rightarrow x=$

જો $(\tan ^{-1} x)^2+(\cot ^{-1} x)^2=\frac{5 \pi^2}{8}$ હોય,તો $x$ ની કિંમત શોધો.

જો ${\tan ^{ - 1}}(x - 1) + {\tan ^{ - 1}}x + {\tan ^{ - 1}}(x + 1) = {\tan ^{ - 1}}3x$ હોય,તો $x =$

જો $\sin^{-1} x + \sin^{-1} y + \sin^{-1} z = \frac{\pi}{2}$ હોય,તો $x^2 + y^2 + z^2 + 2xyz$ ની કિંમત કેટલી થાય?

જો $(\tan ^{-1} x)^2+(\cot ^{-1} x)^2=\frac{5 \pi^2}{8}$ હોય,તો $x^2+1=$

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