题目内容

已知函数.

(1)求的最小正周期;

(2)求的的最大值和最小值;

(3)若,求的值.

解:∵=                

 ∴                                        

(1) 的最小正周期                               

(2)             

(3)∵                                     

                                  

                       

                                          

                                          

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