f(x)=1+sinx*cosx=1+(1/2)sin(2x)(1) 当2x=2kπ+π/2,k∈Z时,f(x)有最大值3/2此时x=kπ+π/4,k∈Z,即x的取值集合是{x|x=kπ+π/4,k∈Z}(2)减区间即 2kπ+π/2≤2x≤2kπ+3π/2,k∈Z即 kπ+π/4≤x≤kπ+3π/4,k∈Z即...