已知sin(α+π6)=1/3,则cos(π3-α)= _ .
问题描述:
已知sin(α+
)=π 6
,则cos(1 3
-α)= ___ .π 3
答
由诱导公式可得cos(
-α)=sin[π 3
-(π 2
-α)]=sin(α+π 3
)=π 6
.1 3
故答案为:
1 3