问题 问答题

答案

参考答案:[解] 方法1 命arcsinex=t,x=lnsint,dx=cottdt,有
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方法2 [*]
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方法3 [*]

探究题

一说康乾是盛世,一说康乾不是盛世,为什么?谈谈你的正确观点。

                                                                                                                                                            

                                                                                                                                                            

                                                                                                                                                            

                                                                                                                                                            

                                                                                                                                                            

                                                                                                                                                             

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