1.△ABC中,∠C=90°,根据表中的数据求其它元素的值:
| a | b | c | ∠A | ∠B |
| 12 | 30° | |||
| 4 | 45° | |||
|
| 60° | |||
| 5 | 5 | |||
| 4 | 8 |
1.△ABC中,∠C=90°,根据表中的数据求其它元素的值:
| a | b | c | ∠A | ∠B |
| 12 | 30° | |||
| 4 | 45° | |||
|
| 60° | |||
| 5 | 5 | |||
| 4 | 8 |