यदि $f^{\prime}(x)=a \cos x+b \sin x$ और $f^{\prime}(0)=4, f(0)=3, f\left(\frac{\pi}{2}\right)=5$ है,तो $f(x)=$

  • A
    $2 \cos x+4 \sin x+1$
  • B
    $4 \cos x+2 \sin x+1$
  • C
    $2 \cos x+3 \sin x+1$
  • D
    $4 \cos x+\sin x+1$

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$\tan^{-1}x$ के सापेक्ष $\frac{{\tan^{-1}x}}{{1 + \tan^{-1}x}}$ का अवकल गुणांक ज्ञात कीजिए।

यदि $y = \sin^{98}(x) \cdot \cos^{39}(x)$ है,तो $\frac{dy}{dx}$ ज्ञात कीजिए।

$\frac{d}{dx}(e^{x\sin x}) = $

यदि $x-y=\pi$ है,तो $\frac{dy}{dx}$ ज्ञात कीजिए।

यदि $y = \log_{e} x^3 + 3 \sin^{-1} x + k x^2$ और $y'(\frac{1}{2}) = 2 \sqrt{3}$ है,तो $k =$

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