标签：style ar color sp on 2014 ef size c
$$\bex \frac{\sin x}{x}\nearrow. \eex$$ Ref. [Proof Without Words: Monotonicity of $\sin x/x$ on $(0,\pi/2)$, The College Mathematics Journal]
[再寄小读者之数学篇](2014-11-19 $\sin x/x$ 在 $(0,\pi/2)$ 上递增)
标签：style ar color sp on 2014 ef size c
原文地址：http://www.cnblogs.com/zhangzujin/p/4107697.html
