题目内容
| 1 |
| 4 |
| 1 |
| sin230° |
| tan45° |
| cos0° |
| sin40° |
| cos50° |
原式=
×12+
-3×（
）2+1-
=
+4-
+1-1
=2．
| 1 |
| 4 |
| 1 | ||
(
|
| ||
| 2 |
| sin40° |
| sin40° |
=
| 1 |
| 4 |
| 9 |
| 4 |
=2．
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同步奥数系列答案
相关题目
同步奥数系列答案题目内容
| 1 |
| 4 |
| 1 |
| sin230° |
| tan45° |
| cos0° |
| sin40° |
| cos50° |
| 1 |
| 4 |
| 1 | ||
(
|
| ||
| 2 |
| sin40° |
| sin40° |
| 1 |
| 4 |
| 9 |
| 4 |
同步奥数系列答案