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化简cos^2(-α)-[tan(360°+α)/sin(-α)]
人气:180 ℃ 时间:2020-01-28 17:00:58
解答
cos^2(-α)-[tan(360°+α)/sin(-α)]
=cos^2(α)+tanα/sinα
=cos^2(α)+1/cosα
这已经是够简的了,若还有问题可以直接HI我.
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