From dd5891b86118744b08a2b0699a451536bdab70fd Mon Sep 17 00:00:00 2001 From: wangweiye7840 Date: Mon, 22 Jan 2024 13:09:28 +0800 Subject: [PATCH] =?UTF-8?q?=E4=BF=AE=E6=94=B9B00209=E5=86=85=E5=AE=B9?= =?UTF-8?q?=E7=9A=84=E4=B8=80=E5=A4=84=E9=94=99=E8=AF=AF?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- 题库0.3/BasicKnowledge.json | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/题库0.3/BasicKnowledge.json b/题库0.3/BasicKnowledge.json index ead20e3a..52ebc4ba 100644 --- a/题库0.3/BasicKnowledge.json +++ b/题库0.3/BasicKnowledge.json @@ -1511,7 +1511,7 @@ "K0508002B", "K0508003B" ], - "content": "向量夹角的坐标表示: $\\cos \\langle\\overrightarrow{a}, \\overrightarrow{b}\\rangle=\\dfrac{\\overrightarrow{a}\\cdot \\overrightarrow{b}}{|\\overrightarrow{a}||\\overrightarrow{b}|}=\\dfrac{x_1 x_2+y_1 y_2}{\\sqrt{x_1^2+y_1^2}\\cdot \\sqrt{x_2^2+y_2^2}}$\\." + "content": "向量夹角的坐标表示: $\\cos \\langle\\overrightarrow{a}, \\overrightarrow{b}\\rangle=\\dfrac{\\overrightarrow{a}\\cdot \\overrightarrow{b}}{|\\overrightarrow{a}||\\overrightarrow{b}|}=\\dfrac{x_1 x_2+y_1 y_2}{\\sqrt{x_1^2+y_1^2}\\cdot \\sqrt{x_2^2+y_2^2}}$." }, "B00210": { "lesson": "K0508",