If for a real number \( y,[y] \) is the greatest integer less than or equal to \( y \), then the... VIDEO
If for a real number \( y,[y] \) is the greatest integer less than or equal to \( y \), then the value of the integral \( \int_{\pi / 2}^{3 \pi / 2}[2 \sin x] d x \) is
P
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(a) \( -\pi \)
(b) 0
\( (1999,2 \mathrm{M}) \)
(c) \( -\frac{\pi}{2} \)
(d) \( \frac{\pi}{2} \)
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