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数学
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1+sinx+cosx+2sinxcosx/1+sinx+cosx=sinx+cosx
证明
人气:420 ℃ 时间:2020-03-29 05:12:48
解答
(sinx+cosx)(1+sinx+cosx)展开,证明等于1+sinx+cosx+2sinxcosx即可.
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