tan21°+tan24°+tan21°tan24°的值怎么算啊?
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:数学作业 时间:2024/07/31 01:32:56
tan21°+tan24°+tan21°tan24°的值怎么算啊?
![tan21°+tan24°+tan21°tan24°的值怎么算啊?](/uploads/image/z/8149353-33-3.jpg?t=tan21%C2%B0%2Btan24%C2%B0%2Btan21%C2%B0tan24%C2%B0%E7%9A%84%E5%80%BC%E6%80%8E%E4%B9%88%E7%AE%97%E5%95%8A%3F)
tan45°=tan(21°+24°)=(tan21°+tan24°)/[1-tan21°tan24°]=1
tan21°+tan24°=1-tan21°tan24°
tan21°+tan24°+tan21°tan24°=1
tan21°+tan24°=1-tan21°tan24°
tan21°+tan24°+tan21°tan24°=1
tan21°+tan24°+tan21°tan24°的值怎么算啊?
(1+tan21°)(1+tan22°)(1+tan23°)(1+tan24°)的值是 ______.
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