\[\int_{{}}^{{}}{\frac{1}{x}{{\sec }^{2}}(\log x)dx=}\]

1.	\[\int_{{}}^{{}}{\frac{1}{x}{{\sec }^{2}}(\log x)dx=}\]
A.	\[\tan (\log x)+c\]
B.	\[\log (\sec x)+c\]
C.	\[\log (\tan x)+c\]
D.	\[\sec (\log x)\ .\ \tan (\log x)+c\]
Answer» B. \[\log (\sec x)+c\]

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\[\int_{{}}^{{}}{\frac{1}{x}{{\sec }^{2}}(\log x)dx=}\]

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