已知函数f(x)=2根号3sinxcosx+2cos^2x-1若f(x0)=6/5,x0∈[π/
已知函数f(x)=2根号3sinxcosx+2cos^2x-1
若f(x0)=6/5,x0∈[π/4,π/2],求cos2x0的值