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已知tan(4/PAI+α)=3,计算tanα
人气:381 ℃ 时间:2020-06-18 05:34:06
解答
tan(π/4+α)=(tanπ/4+tanα)/(1-tanπ/4tanα)=3
(1+tanα)/(1-tanα)=3
1+tanα=3-3tanα
tanα=1/2
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