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Last Updated: Nov 29, 2020
「数学」夹角公式
Posted: Mar 09, 2020
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内容

设直线 $l_1$ 、 $l_2$ 的斜率存在，分别为 $k_1$ 、 $k_2$ ，

$l_1$ 与 $l_2$ 的夹角为 $\theta$ ，则 $\tan \theta=\left|\frac{k_{1}-k_{2}}{1+k_{1} k_{2}}\right|$。

Article License: CC BY-NC-ND 4.0
Article Author: XiaoHuang
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