题目内容
sin(arccos
+arccos
)=______.
| 1 |
| 2 |
| 1 |
| 3 |
sin(arccos
+arccos
)=sin(arccos
)cos(arccos
)+cos(arccos
)sin(arccos
)=
•
+
•
=
故答案为;
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 2 |
| 1 |
| 3 |
1-
|
| 1 |
| 3 |
| 1 |
| 2 |
1-
|
2
| ||||
| 6 |
故答案为;
2
| ||||
| 6 |
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相关题目
sin[arccos(-
)]等于( )
| 1 |
| 2 |
A、
| ||||
B、-
| ||||
C、
| ||||
D、-
|