cot函数是无界函数吗
是的，cot函数是无界函数。在数学上，无界函数是指函数在某些区间内不具有上界或下界。cot函数的定义域为实数集R中除去所有整数倍的π，即D = R - {kπ | k∈Z}。在这个定义域内，cot函数的值可以无限增大或无限减小，因此它是无界函数。
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