\[\int_{{}}^{{}}{\frac{\tan (\log x)}{x}\ dx=}\]

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

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\[\int_{{}}^{{}}{\frac{\tan (\log x)}{x}\ dx=}\]

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