f(x)=2根号3sinxcosx+2cos^2x-1
=√3 sin2x+cos2x
=2sin(2x+π/6)
kπ+π/2≤2x+π/6≤kπ+π,k∈Z
解出x得g(x)=|f(x)|的单减区间
f(A)=2sin(2A+π/6)=2/3
sin(2A+π/6)=1/3
0
f(x)=2根号3sinxcosx+2cos^2x-1
=√3 sin2x+cos2x
=2sin(2x+π/6)
kπ+π/2≤2x+π/6≤kπ+π,k∈Z
解出x得g(x)=|f(x)|的单减区间
f(A)=2sin(2A+π/6)=2/3
sin(2A+π/6)=1/3
0