1、倒数关系tanα ·cotα＝1sinα ·cscα＝1cosα ·secα＝12、商数关系tanα=sinα/cosαcotα=cosα/sinα3、平方关系sinα²+cosα²=11+tanα²=secα²1+cotα²=cscα²4、求导关系sec’=sectantan’=sec^25、原函数tan=(-ln|cos|)’...

A pitfall that may be encountered when removing an element from a list in a for loop in pythonexample:nums = [1, 2, 3, 4, 5]for i in nums:if i == 3:nums.remove(i)print(i)# re...