问题
填空题
函数y=sin(x+
|
答案
函数y=sin(x+
)•sin(x+π 6
)=(sinxcosπ 2
+cosxsinπ 6
)cosx=π 6
sinxcosx+3 2
cos2x=1 2
sin2x+3 4
(1+cos2x)1 4
=
sin(2x+1 2
),π 6
故函数的最小正周期为
=π,2π 2
故答案为 π.
函数y=sin(x+
|
函数y=sin(x+
)•sin(x+π 6
)=(sinxcosπ 2
+cosxsinπ 6
)cosx=π 6
sinxcosx+3 2
cos2x=1 2
sin2x+3 4
(1+cos2x)1 4
=
sin(2x+1 2
),π 6
故函数的最小正周期为
=π,2π 2
故答案为 π.