\[\int\limits_{0}^{2\pi }{\log \left( \frac{a+b\sec x}{a-b\sec x} \right)}dx=\]

\[\frac{\pi }{2}({{a}^{2}}-{{b}^{2}})\]

\[\int\limits_{0}^{2\pi }{\log \left( \frac{a+b\sec x}{a-b\sec x} \rig

1.	\[\int\limits_{0}^{2\pi }{\log \left( \frac{a+b\sec x}{a-b\sec x} \right)}dx=\]
A.	0
B.	\[\pi /2\]
C.	\[\frac{\pi (a+b)}{a-b}\]
D.	\[\frac{\pi }{2}({{a}^{2}}-{{b}^{2}})\]
Answer» B. \[\pi /2\]

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\[\int\limits_{0}^{2\pi }{\log \left( \frac{a+b\sec x}{a-b\sec x} \right)}dx=\]

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