[MP PET 1998; Pb. CET 2001]
A) $ \pi $
B) 0
C) 2
D) 1
Correct Answer: C
$ \int_0^{\pi }{|\cos x|}dx=2\int_0^{\pi /2}{|\cos x|dx=2[\sin x]_0^{\pi /2}=2} $ .
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