[三角函数] 2022年初中数学三角函数基础 2022-09-05
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[三角函数] 2022年初中数学特殊三角函数值 2022-09-05
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[三角函数] 2022年初中数学如何学习三角函数 2022-09-05
'); (window.slotbydup=window.slotbydup || []).push({ id: '8096091', container: s, size: '580,90', display: 'inlay-fix' });})(); ①基本公式：sin x+cos x=1 sin x/cos x=tan x ②30、45、60角的正弦余弦正切值 ③正弦定理余弦...
[三角函数] 2022年初中数学锐角三角函数 2022-09-05
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[三角函数] 2022年初中数学锐角三角函数 2022-09-05
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[三角函数] 2022年初中数学三角函数三倍角公式 2022-09-05
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[轴对称] 2022年初中数学常见的轴对称图形和中心对称图形 2022-09-05
'); (window.slotbydup=window.slotbydup || []).push({ id: '8096091', container: s, size: '580,90', display: 'inlay-fix' });})(); 几种常见的轴对称图形和中心对称图形： 轴对称图形：线段、角、等腰三角形、等边三...
[轴对称] 2022年初中数学对称图形易错点 2022-09-05
'); (window.slotbydup=window.slotbydup || []).push({ id: '8096091', container: s, size: '580,90', display: 'inlay-fix' });})(); 易错点1：轴对称、轴对称图形，及中心对称、中心对称图形概念和性质把握不准。 易错...
[轴对称] 2022年初中数学轴对称的性质 2022-09-05
'); (window.slotbydup=window.slotbydup || []).push({ id: '8096091', container: s, size: '580,90', display: 'inlay-fix' });})(); 轴对称的性质 1、两个图形沿一条直线对折后，能够重合的点称为对应点(对称点)，能够...
[轴对称] 2022年初中数学知识点旋转 2022-09-05
'); (window.slotbydup=window.slotbydup || []).push({ id: '8096091', container: s, size: '580,90', display: 'inlay-fix' });})(); 分页标题 '); (window.slotbydup=window.slotbydup || []).push({ id: '8096091', container: s, size: '580,...