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sin^2A+cos^2A/sinAcosA=-10/3怎么得到 tanA+1/tanA=-10/3
人气:237 ℃ 时间:2020-04-14 11:52:36
解答
(sin^2A+cos^2A)/(sinAcosA)
=sin^2A/(sinAcosA)+cos^2A/(sinAcosA)
= tanA+1/tanA
=-10/3
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