$\frac{d}{dx}\left( \frac{\cot^2 x - 1}{\cot^2 x + 1} \right) = $

  • A
    $-\sin 2x$
  • B
    $2\sin 2x$
  • C
    $2\cos 2x$
  • D
    $-2\sin 2x$

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નીચે આપેલ વિધેયનું વિકલન શોધો: $\frac{x}{\sin^{n} x}$ (જ્યાં $n$ એ પૂર્ણાંક છે).

$\frac{d}{d x}\left[a \tan ^{-1} x+b \log \left(\frac{x-1}{x+1}\right)\right]=\frac{1}{x^4-1}$
$\Rightarrow a-2 b$ ની કિંમત શોધો.

જો $r = [2\phi + \cos^2(2\phi + \pi/4)]^{1/2}$ હોય,તો $\phi = \pi/4$ આગળ વિકલિત $dr/d\phi$ નું મૂલ્ય શું છે?

જો $x > 0$ માટે $y = \log(\sec(\tan^{-1} x))$ હોય,તો $x = 1$ આગળ $\frac{dy}{dx}$ ની કિંમત શોધો.

જો $y = t^{4/3} - 3t^{-2/3}$ હોય,તો $\frac{dy}{dt} = $

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