题目内容
已知sin(x+
)=
,则sin(
-x)+sin2(
-x)=______.
| π |
| 6 |
| 1 |
| 4 |
| 5π |
| 6 |
| π |
| 3 |
∵sin(x+
) =
,
∴cos(
-x) =
,
∴sin(
-x) +sin2(
-x)
=sin(x+
) +1-cos2(
-x)
=
+1-(
)2
=
,
故答案为:
| π |
| 6 |
| 1 |
| 4 |
∴cos(
| π |
| 3 |
| 1 |
| 4 |
∴sin(
| 5π |
| 6 |
| π |
| 3 |
=sin(x+
| π |
| 6 |
| π |
| 3 |
=
| 1 |
| 4 |
| 1 |
| 4 |
=
| 19 |
| 16 |
故答案为:
| 19 |
| 16 |
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