\[\underset{x\to \pi /2}{\mathop{\lim }}\,\left[ x\tan x-\left( \frac{\pi }{2} \right)\sec x \right]=\]

\[\underset{x\to \pi /2}{\mathop{\lim }}\,\left[ x\tan x-\left( \frac{

1.	\[\underset{x\to \pi /2}{\mathop{\lim }}\,\left[ x\tan x-\left( \frac{\pi }{2} \right)\sec x \right]=\]
A.	1
B.	?1
C.	0
D.	None of these
Answer» C. 0

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\[\underset{x\to \pi /2}{\mathop{\lim }}\,\left[ x\tan x-\left( \frac{\pi }{2} \right)\sec x \right]=\]

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