问题
填空题
在△ABC中，∠B=90°，AC边上的中线BD=5，AB=8，则tan∠ACB=______．
答案
在△ABC中，∠B=90°，斜边AC边上的中线BD=5，
∴AC=2BD=10．
又AB=8，
∴tan∠ACB=
=AB BC
．4 3
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在△ABC中，∠B=90°，AC边上的中线BD=5，AB=8，则tan∠ACB=______．
在△ABC中，∠B=90°，斜边AC边上的中线BD=5，
∴AC=2BD=10．
又AB=8，
∴tan∠ACB=
=AB BC
．4 3
| 完形填空. | |||
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