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$\frac{d}{d x} (c o s^{2} (\ln x)) = ?$

- \frac{\sin (2 \ln x)}{2}

- \frac{2 \cos (\ln x)}{x}

- \frac{\sin (2 \ln x)}{x}

- 2 x \cos (\ln x) \sin (\ln x)

ANS :

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