f(x)=mn
=sin(x+派/6)*2+2sinx/2*sinx/2
=2sin(x+派/6)+1-cosx
=2sinxcos派/6+2sin派/6cosx+1-cosx
=√3sinx+cosx+1-cosx
=√3sinx+1
因为x∈[0,派]
所以 0