f(x)=sinxcosπ/3+cosxsinπ/3+sinx =sinx/2+根号3/2cosx+sinx =3/2sinx+根号3/2cosx =根号3(根号3/2sinx+1/2cosx) =根号3(cosπ/6 sinx+sinπ/6cox) =根号3sin(x+π/3) 当sin(x+π/3)=1时,最大值根号3 当sin(x+π/3)=-1时,最小值为-根号3 满意请及时采纳满意请采纳