જો $y = \cos (\sin {x^2}),$ હોય,તો $x = \sqrt {\frac{\pi }{2}} $ આગળ $\frac{dy}{dx} = $

  • A
    $ -2 $
  • B
    $ 2 $
  • C
    $ -2\sqrt {\frac{\pi }{2}} $
  • D
    $ 0 $

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જો $y = \frac{e^{2x} + e^{-2x}}{e^{2x} - e^{-2x}}$ હોય,તો $\frac{dy}{dx} = $

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વિકલન શોધો: $\frac{d}{dx} \sqrt{x \sin x}$

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