函数y=sinxcos(x+π4)+cosxsin(x+π4)的最小正周期T=_.
问题描述:
函数y=sinxcos(x+
)+cosxsin(x+π 4
)的最小正周期T=______. π 4
答
y=sinxcos(x+
)+cosxsin(x+π 4
)=sin(x+x+π 4
)=sin(2x+π 4
)π 4
对于y=sin(2x+
),最小正周期T=π 4
=π2π 2
故答案为:π