作业帮化简,cos²(-α)-tan(360°+α)/sin(-α)
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化简,cos²(-α)-tan(360°+α)/sin(-α)
化简,cos²(-α)-tan(360°+α)/sin(-α)
化简,cos²(-α)-tan(360°+α)/sin(-α)
cos^2(-α)-[tan(360°+α)/sin(-α)]
=cos^2(α)+tanα/sinα
=cos^2(α)+1/cosα