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13、高三数学如何用三角函数辅助角公式求最值问题
学状教育：www.xuezhuangjiaoyu.com,学科状元学校，李朝银老师主讲 13、高三数学如何用三角函数辅助角公式求最值问题
高三数学高考复习视频（一）13/33
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