f(x)=sin(x+π/6)+sin(x-π/6)+cosx+a=2sinxcosπ/6+cosx+a=√3sinx+cosx+a=2sin(x+π/6)+a1)因为最大值=1所以,2*1+a=1,a=-12)f(x)≥02sin(x+π/6)≥1sin(x+π/6)≥1/22kπ+π/6≤x+π/6≤2kπ+5π/62kπ≤x≤2kπ+2...