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