题目内容
空间中一长方体如下图所示,其中ABCD为正方形,
为长方体的一边.已知cot∠AEB=
,则cot∠CED=______

| . |
| BE |
2
| ||
| 5 |
如图,∠ABE=∠DCE=90°
设
| . |
| AB |
| . |
| BC |
| . |
| CD |
| . |
| DA |
2
| ||
| 5 |
| ||
| a |
2
| ||
| 5 |
?
| . |
| BE |
2
| ||
| 5 |
| . |
| CE |
|
a2+(
|
| 7 |
| 5 |
故cot∠CED=
| ||
|
| ||
| a |
| 7 |
| 5 |
故答案为:
| 7 |
| 5 |
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题目内容
| . |
| BE |
2
| ||
| 5 |
| . |
| AB |
| . |
| BC |
| . |
| CD |
| . |
| DA |
2
| ||
| 5 |
| ||
| a |
2
| ||
| 5 |
| . |
| BE |
2
| ||
| 5 |
| . |
| CE |
|
a2+(
|
| 7 |
| 5 |
| ||
|
| ||
| a |
| 7 |
| 5 |
| 7 |
| 5 |