已知sin(x+π3)=1/3,则sin(2π3−x)+sin2(π6−x)=_.

问题描述:

已知sin(x+

π
3
)=
1
3
,则sin(
3
−x)+sin2(
π
6
−x)
=______.

∵已知sin(x+

π
3
)=
1
3
,∴cos(
π
6
-x)=
1
3

sin(
3
−x)+sin2(
π
6
−x)
=sin(x+
π
3
)
+1-cos2(
π
6
−x)
=
1
3
+1-
1
9
=
11
9

故答案为:
11
9