\[\int_{{}}^{{}}{\frac{\cot x\tan x}{{{\sec }^{2}}x-1}}\ dx=\]

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

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\[\int_{{}}^{{}}{\frac{\cot x\tan x}{{{\sec }^{2}}x-1}}\ dx=\]

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