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一、什么是acos函数 acos函数是反余弦函数，如果y=cos(x)，则x=acos(y)。acos函数的定义域为[-1,1]，值域为[0,π]。acos函数可以用于计算两个向量…

React, developed by Facebook, has been one of the most popular JavaScript libraries in the…