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cos720度等于多少
更新时间: 2020-10-03 00:00:00  

1、cos是三角余弦函数;

2、720度是2个整周期,通过余弦函数的定理,可以得知2个整周期是在余弦函数的图象的取值;

3、余弦函数图象在2个整周期的值为1,所以cos720度等于1。

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