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

  • A
    $\frac{1}{2(1 + x)\sqrt{x}}$
  • B
    $\frac{1}{(1 + x)\sqrt{x}}$
  • C
    $-\frac{1}{2(1 + x)\sqrt{x}}$
  • D
    આમાંથી કોઈ નહીં

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જો $2 \sin ^{-1} x-3 \cos ^{-1} x=4, x \in[-1,1]$ હોય,તો $2 \sin ^{-1} x+3 \cos ^{-1} x$ ની કિંમત શોધો.

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