Question
$\int_{}^{} {\frac{1}{x}{{\sec }^2}(\log x)dx = } $
तब$\int_{}^{} {\frac{1}{x}{{\sec }^2}(\log x)\,dx} = \int_{}^{} {{{\sec }^2}t\,dt = \tan t + c} $
$= \tan (\log x) + c$.
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$(A)$ $S \geq \frac{1}{ e }$ $(B)$ $S \geq 1-\frac{1}{ e }$
$(C)$ $S \leq \frac{1}{4}\left(1+\frac{1}{\sqrt{e}}\right)$ $(D)$ $S \leq \frac{1}{\sqrt{2}}+\frac{1}{\sqrt{e}}\left(1-\frac{1}{\sqrt{2}}\right)$