Chrome，
QQ浏览器
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![人教A高中数学必修四1.4 三角函数的图像与性质（通用）[刘冰]【市一等奖】优质课](//imgshow.1ydt.com/img?url=%2F%2Fi0.hdslb.com%2Fbfs%2Farchive%2F70e39bddcb72a55a37c5aae228078fd6dbc8381d.jpg%40672w_378h_1c_%21web-search-common-cover)
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![[manim]讲给初中生的高中数学--三角函数(1)](//imgshow.1ydt.com/img?url=%2F%2Fi1.hdslb.com%2Fbfs%2Farchive%2F818e2e908eee89fd3aa1c27989105da3855005ea.jpg%40672w_378h_1c_%21web-search-common-cover)
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播放：24 时间：2024-06-19简介： -
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![人教A高中数学必修四1.4 三角函数的图像与性质（通用）[刘冰]【市一等奖】优质课](http://imgshow.1ydt.com/img?url=%2F%2Fi0.hdslb.com%2Fbfs%2Farchive%2F70e39bddcb72a55a37c5aae228078fd6dbc8381d.jpg%40672w_378h_1c_%21web-search-common-cover)
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