[Karnataka CET 2005]
A) $ -1 $
B) 1
C) 0
D) $ \frac{1}{2} $
Correct Answer: B
$ \int _{\pi /4}^{\pi /2}{cose{c^{2}}}x\ dx=[ -\cot x ] _{\pi /4}^{\pi /2} $
$ =-[ \cot \frac{\pi }{2}-\cot \frac{\pi }{4} ]=1 $ .
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