题目

— What's the matter with you?— I caught __________ bad cold and had to stay in _________ bed. A . a; (不填) B . a; the C . a; a D . the; the 答案：A已知函数f（x）=sin2x+xcosx+2cos2x，x∈R。（1）求函数f（x）的最小正周期和单调增区间；（2）函数f（x）的图象可以由函数y=sin2x（x∈R）的图象经过怎样的变换得到？