f(x)=2a●b
=2cos²wx+2√3sin(π-wx)sin(π/2+wx)
=1+cos2wx+2√3sinwxcoswx
=2(√3/2sinwx+1/2coswx+1
=2sin(wx+π/6)+1
周期T=π,w=2,最大值3最小值-1
递增区间[kπ-π/3,kπ+π/6]k∈Z
f(x)=2a●b
=2cos²wx+2√3sin(π-wx)sin(π/2+wx)
=1+cos2wx+2√3sinwxcoswx
=2(√3/2sinwx+1/2coswx+1
=2sin(wx+π/6)+1
周期T=π,w=2,最大值3最小值-1
递增区间[kπ-π/3,kπ+π/6]k∈Z