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58问答库 > cos1°+cos59°等于多少

cos1°+cos59°等于多少

2025-03-16 00:03:06

推荐回答（3个）

回答（1）：

出于书写简单的目的，以下的角度均省略“度”的符号
cos59=cos(60-1)=cos60cos1+sin60sin1=(cos1)/2+(根3sin1)/2
所以，
cos1+cos59=(3cos1)/2+(根3sin1)/2=根3*((根3cos1)/2+(sin1)/2)
=根3*(sin60cos1+cos60sin1)=根3*sin61
算得不太仔细，不知道对不对。方法上就是这样，如果中间的计算哪里有错的话欢迎指出

回答（2）：

cos(1°) = 0.99984769515639
cos(59°) = 0.51503807491005

cos1°+cos59°=1.51488577

回答（3）：

这个找个计算机不就解决了么！！

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