f(x)=1/2*a*b
=(1/2)*[4sin(x+π/3)cosx-√3]
=2sin(x+π/3)cosx-√3/2
=sin(2x+π/3)+sin(π/3)-√3/2
=sin(2x+π/3)+√3/2-√3/2
所以解析式y=sin(2x+π/3)
单调递增区间2x+π/3∈[2kπ-π/2,2kπ+π/2]
x∈[kπ-5π/12,kπ+π/12]
f(x)=1/2*a*b
=(1/2)*[4sin(x+π/3)cosx-√3]
=2sin(x+π/3)cosx-√3/2
=sin(2x+π/3)+sin(π/3)-√3/2
=sin(2x+π/3)+√3/2-√3/2
所以解析式y=sin(2x+π/3)
单调递增区间2x+π/3∈[2kπ-π/2,2kπ+π/2]
x∈[kπ-5π/12,kπ+π/12]