The value of the definite integral \( \int_{0}^{\pi / 2} \frac{\sin 5 x}{\sin x} d x \) is (A) 0...

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The value of the definite integral \( \int_{0}^{\pi / 2} \frac{\sin 5 x}{\sin x} d x \) is
(A) 0
(B) \( \frac{\pi}{2} \)
(C) \( \pi \)
(D) \( 2 \pi \)
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