Re: [微積] 如何證明lim sinx/x=1如果面積概念未定義
※ 引述《JohnMash (Paul)》之銘言：
: ※ 引述《sightseer ()》之銘言：
: : 常見的證明lim sinx/x=1 as x approaches 0的方法如下(夾擠定理)
: : http://tinyurl.com/kgkuehy
: : 其中用到 扇形OKA的面積=1/2*R^2*x
: : 但是這已經先假設我們已知如何定義並計算扇形面積了
: : 所以如果"面積"概念尚未定義的情況下
: : lim sinx/x=1如何證明?
: 本解法只用弧線長大於直線長及其類推
: 來證明
: http://imgur.com/ILy7jk1
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