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数学
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tanα/tanα-1=1/2
为什么谈tanα=1/3
人气:302 ℃ 时间:2020-09-05 20:06:52
解答
因为tanα/tanα-1=1/2,可以得出tanα-1=2tanα,tanα-2tanα=1,-tanα=1,所以tanα=-1
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