જો $f(\theta) = \cos \theta_1 \cdot \cos \theta_2 \cdot \cos \theta_3 \cdots \cos \theta_n$ હોય,તો $\tan \theta_1 + \tan \theta_2 + \tan \theta_3 + \cdots + \tan \theta_n =$
- A$\frac{-f^{\prime}(\theta)}{f(\theta)}$
- B$\frac{f^{\prime}(\theta)}{f(\theta)}$
- C$\frac{-f^{\prime \prime}(\theta)}{f^{\prime}(\theta)}$
- D$\frac{f^{\prime \prime}(\theta)}{f^{\prime}(\theta)}$
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$f(x)=x^{\tan ^{-1} x}$ નું $g(x)=\sec ^{-1}\left(\frac{1}{2 x^2-1}\right)$ ની સાપેક્ષમાં વિકલન શું થાય?
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જો $y = f(x)^{g(x)}$ અને $\frac{dy}{dx} = y[H(x)f'(x) + G(x)g'(x)]$ હોય, તો $\int \frac{G(x)H(x)f'(x)}{g(x)} dx =$
વિધાન $(A)$: $\frac{d}{d x}\left(\frac{x^2 \sin x}{\log x}\right)=\frac{x^2 \sin x}{\log x} \left(\cot x+\frac{2}{x}-\frac{1}{x \log x}\right)$
કારણ $(R)$: $\frac{d}{d x}\left(\frac{u v}{w}\right)=\frac{u v}{w}\left[\frac{u^{\prime}}{u}+\frac{v^{\prime}}{v}-\frac{w^{\prime}}{w}\right]$
કારણ $(R)$: $\frac{d}{d x}\left(\frac{u v}{w}\right)=\frac{u v}{w}\left[\frac{u^{\prime}}{u}+\frac{v^{\prime}}{v}-\frac{w^{\prime}}{w}\right]$
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