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主要内容

直接带入的结论(找出极限)

问题

h, left parenthesis, x, right parenthesis, equals, start fraction, 1, minus, cosine, left parenthesis, x, right parenthesis, divided by, 2, sine, squared, left parenthesis, x, right parenthesis, end fraction
limit, start subscript, x, \to, 0, end subscript, h, left parenthesis, x, right parenthesis.
如果使用代入法会怎样?
选出正确答案:
不会做了?
不会做了?