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[高一数学寒假4]余弦定理初步
高一数学同步课堂48/127
![[高一数学寒假3]正弦定理初步＆解三角形多解问题讨论](http://p26-sign.bdxiguaimg.com/tos-cn-i-0004/ea9cfbdb8a9a405b97cc56480dd82d54~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=202411150726514F656568FD0D1B30AEA0&requestFrom=704&version_code=80402&x-expires=1763162812&x-signature=PEp11EWFj9CHlbnhQOV4qWeiW00%3D)
App24:59![[高一数学寒假4]余弦定理初步](http://p3-sign.bdxiguaimg.com/tos-cn-i-0004/9800565a19c34ed3af8a890dcc8281e9~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=202411150726514F656568FD0D1B30AEA0&requestFrom=704&version_code=80402&x-expires=1763162812&x-signature=jo%2FePTv44Azshzy5stH145c2ieY%3D)
App21:06![[三角函数9]二倍角公式＆半角公式&万能公式](http://p26-sign.bdxiguaimg.com/tos-cn-i-0004/cf131bd850b241d1827222918fe15021~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=202411150726514F656568FD0D1B30AEA0&requestFrom=704&version_code=80402&x-expires=1763162812&x-signature=yIhOrKL%2Fj%2Bsi6kAujs5GmCf6sbw%3D)
App14:39![[高一数学寒假5]复数的概念及运算](http://p26-sign.bdxiguaimg.com/tos-cn-i-0004/ecb6b93552544130993b5503c0887780~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=202411150726514F656568FD0D1B30AEA0&requestFrom=704&version_code=80402&x-expires=1763162812&x-signature=m6Illm3ne6kVLYWCa5JChTRry7Q%3D)
App22:50![[高一数学寒假6]立体几何概念和结构(上集）](http://p26-sign.bdxiguaimg.com/tos-cn-i-0004/cbbe7f28d3c8445782d315b8c662f4a9~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=202411150726514F656568FD0D1B30AEA0&requestFrom=704&version_code=80402&x-expires=1763162812&x-signature=wa1I0wlBllhLD5%2Bh3V6h9db1TUc%3D)
App14:12![[高一数学寒假7]立体几何概念和结构下集）](http://p3-sign.bdxiguaimg.com/tos-cn-i-0004/9e58455a1799466cbf3ee820c7c667b6~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=202411150726514F656568FD0D1B30AEA0&requestFrom=704&version_code=80402&x-expires=1763162812&x-signature=dK6Y%2F8nMox7OxZkvKPX5AdhveP0%3D)
App19:52![平面向量的基底法VS坐标法，动点问题何去何从？[高一春季1]](http://p3-sign.bdxiguaimg.com/tos-cn-i-0004/c027483bf51b4ed2849a9c00e886d187~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=202411150726514F656568FD0D1B30AEA0&requestFrom=704&version_code=80402&x-expires=1763162812&x-signature=p5WuxtiIr%2BIvbpnXHA7iCvg0BFw%3D)
App26:36![平面向量的最值问题，居然需要基本不等式？[高一春季2]](http://p3-sign.bdxiguaimg.com/tos-cn-i-0004/f64dc5bdb0b140ea8cebf35efc71242a~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=202411150726514F656568FD0D1B30AEA0&requestFrom=704&version_code=80402&x-expires=1763162812&x-signature=F7hntor15HXKhdQeAK9YEGKLSMQ%3D)
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App12:51![高中教材上没有的射影定理，大有用处！[高一春季5]](http://p26-sign.bdxiguaimg.com/tos-cn-i-0004/3c663716368d41bab1f466e402f7b73f~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=202411150726514F656568FD0D1B30AEA0&requestFrom=704&version_code=80402&x-expires=1763162812&x-signature=5zOY5DE%2B6sXdRY6iLe0qD3vgAZk%3D)
App09:29![三角形面积、周长最值，与均值不等式综合[高一春季6]](http://p3-sign.bdxiguaimg.com/tos-cn-i-0004/c2536d0b8174408b807b0e9ad26d485c~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=202411150726514F656568FD0D1B30AEA0&requestFrom=704&version_code=80402&x-expires=1763162812&x-signature=AvraT6RTpSFLuvlUOPteUoXk%2FHg%3D)
App19:51![奔驰定理原来是这样啊！[高中数学]](http://p26-sign.bdxiguaimg.com/tos-cn-i-0004/afd61e1e48254af98c159abdfd37ac23~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=202411150726514F656568FD0D1B30AEA0&requestFrom=704&version_code=80402&x-expires=1763162812&x-signature=bPE5Eee%2FAmFx9Wm2udK1hg61qCY%3D)
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App13:31![立体几何的图形嵌套及体积、表面积[高一春季7]](http://p26-sign.bdxiguaimg.com/tos-cn-i-0004/268ed7dff1614207bd503158c90879ad~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=202411150726514F656568FD0D1B30AEA0&requestFrom=704&version_code=80402&x-expires=1763162812&x-signature=ZN4Fm%2FpZDYV9C3x%2B%2F8xLuScfEBE%3D)
App18:38![[高一春季8]内切球与外接球问题，牢记几个常用模型就可以](http://p3-sign.bdxiguaimg.com/tos-cn-i-0004/c19a883a41df4844b7f74dc20209bd7a~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=202411150726514F656568FD0D1B30AEA0&requestFrom=704&version_code=80402&x-expires=1763162812&x-signature=g8nf3LrdRkLilXEwsg9vvhk5M38%3D)
App12:36![[高一春季10]立体几何面面垂直，其实也不难！](http://p26-sign.bdxiguaimg.com/tos-cn-i-0004/63da19ccb0b9416688051af8c7cd3941~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=202411150726514F656568FD0D1B30AEA0&requestFrom=704&version_code=80402&x-expires=1763162812&x-signature=dyfvlMokFfwvpRyCa%2FjRZ0%2B4cjs%3D)
App08:29![[高一春季9]立体几何线面垂直，究竟如何理解？](http://p3-sign.bdxiguaimg.com/tos-cn-i-0004/4185a9e7ae9f4ad2912d5ee319c6e9dd~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=202411150726514F656568FD0D1B30AEA0&requestFrom=704&version_code=80402&x-expires=1763162812&x-signature=Jym3JZUZtLz52SAIT5%2F48mpN6Zw%3D)
App13:41![立体几何平行篇，定理原来这样用[高一春季11]](http://p3-sign.bdxiguaimg.com/tos-cn-i-0004/5ca72df5a46949108ce65089040a22f0~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=202411150726514F656568FD0D1B30AEA0&requestFrom=704&version_code=80402&x-expires=1763162812&x-signature=zPiRqSLZJBZiXxbm2thY%2F6U4uf4%3D)
App14:50![立体几何中的线面角问题，一节课学会解决[高一春季12]](http://p26-sign.bdxiguaimg.com/tos-cn-i-0004/ebe0fb8167e947ceb50cc5be720effd8~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=202411150726514F656568FD0D1B30AEA0&requestFrom=704&version_code=80402&x-expires=1763162812&x-signature=IcqI%2BS2x4dfTQIT0kgB1%2B61lPcQ%3D)
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