化简cos^2(-α)-[tan(360°+α)/sin(-α)]
问题描述：
化简cos^2(-α)-[tan(360°+α)/sin(-α)]
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.