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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![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°-](/uploads/image/z/6831507-3-7.jpg?t=%E5%8C%96%E7%AE%80%3Acos%2890%C2%B0%2B%CE%B1%29%C2%B7csc%28370%C2%B0%2B%CE%B1%29%C2%B7tan%28180%C2%B0-%CE%B1%29%2Fsec%28360%C2%B0-%CE%B1%29%C2%B7sin%28180%C2%B0%2B%CE%B1%29%C2%B7cot%2890%C2%B0-%CE%B1%EF%BC%89%C2%B7%E6%98%AF%E4%B9%98%E5%8F%B7.%E6%9C%80%E5%90%8E%E7%AD%94%E6%A1%88%E6%98%AF1.%E6%B1%82%E8%BF%87%E7%A8%8B.%3D+%3D%E3%80%82%E5%95%8Asorry%E2%80%A6%E2%80%A6%E6%98%AF270%C2%B0%E2%80%A6%E2%80%A6%E6%88%91%E7%9C%8B%E9%94%99%E4%BA%86%E3%80%82%E5%91%83%E3%80%82%E3%80%90cos%2890%C2%B0%2B%CE%B1%29%C2%B7csc%28270%C2%B0%2B%CE%B1%29%C2%B7tan%28180%C2%B0-%CE%B1%29%E3%80%91%2F%E3%80%90sec%28360%C2%B0-)
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°-
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°-α)·sin(180°+α)·cot(90°-α)】
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°-
还是原来的题目错了,现在对了
cos(90°+α)·csc(270°+α)·tan(180°-α)/sec(360°-α)·sin(180°+α)·cot(90°-α)
=sin(-a)*(-1/cosa) * tan(-a) / (1/cos(a))sin(-a)tan(a)
=1
终于和答案对上了
采纳我吧