The teacher came into the classroom, with a bottle _______ water in his hand.
定义行列式运算:a1a2a3a4=a1a4-a2a3,将函数f(x)=3cosx1sinx的图象向左平移m个单位(m>0),若所得图象对应的函数为偶函数,则m的最小值是( )