$f(x) = \sin 2x$ का अवकलज ज्ञात कीजिए।

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

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मान लीजिए $f(x) = \mathop {\text{Lim}}\limits_{h \to 0} \frac{1}{h} \int\limits_x^{x + h} \frac{dt}{t + \sqrt{1 + t^2}}$,तो $\mathop {\text{Lim}}\limits_{x \to -\infty} x \cdot f(x)$ है

$\frac{d}{dx} \left[ \left( \frac{\tan^2 2x - \tan^2 x}{1 - \tan^2 2x \tan^2 x} \right) \cot 3x \right] =$

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यदि $f(x) = x \tan^{-1} x$ है,तो $\lim_{x \rightarrow 1} \frac{f(x) - f(1)}{x - 1}$ का मान ज्ञात कीजिए।

यदि $f^{\prime}(x)=k(\cos x-\sin x)$,$f^{\prime}(0)=3$,और $f\left(\frac{\pi}{2}\right)=15$ है,तो $f(x)=$

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

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