Question
$\mathrm{f} 0<x<\frac{\pi}{2}$, then(A) $\frac{2}{\pi}>\frac{\sin x}{x}$(B) $\frac{2}{\pi}<\frac{\sin x}{x}$(C) $\frac{\sin x}{x}<1$(D) $\frac{\sin x}{x}>1$
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