sin45°-cos30°+tan60°=?sin60°+tan45°-cos30°=?cos60°-tan30°+sin30°=?sin30°+cos45°=?
人气:105 ℃ 时间:2020-04-20 17:21:07
解答
首先我这儿没有公式编辑器,只会手打,谅解.(1)sin45=二分之根号二,cos30=二分之根号三,tan60=根号三.原式=二分之根号二加根号三.(2)sin60=二分之根号三 ,tan45=1,cos30=二分之根号三,也就是sin60=cos30.原式=tan4...
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