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tanA=3,tan(A-45度)=?
tan(A-45度)
人气:142 ℃ 时间:2020-05-13 11:42:57
解答
tan(A-45°)
=(tanA-tan45°)/(1+tanAtan45°)
=(tanA-1)/(1+tanA)
=(3-1)/(1+3)
=1/2
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