化简:cos(90°+α)·csc(370°+α)·tan(180°-α)/sec(360°-α)·sin(180°+α)·cot(90°-α）·是乘号.最后答案是1.求过程.= =。啊sorry……是270°……我看错了。呃。【cos(90°+α)·csc(270°+α)·tan(180°-α)】/【sec(360°-

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