A) \[-1\]
B) 1
C) 0
D) \[\frac{1}{2}\]
Correct Answer: B
Solution :
\[\int_{\pi /4}^{\pi /2}{\text{cose}{{\text{c}}^{2}}}x\ dx=\left[ -\cot x \right]_{\pi /4}^{\pi /2}\] \[=-\left[ \cot \frac{\pi }{2}-\cot \frac{\pi }{4} \right]=1\].
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