maths
2014-01-10 5:43 am
in the figure,Emily finds that the angles of elevation of the top of a tree from the top A and the bottom B of a 10 m tall building AB are 45 degree and 70 degree.What is the height of the tree?
回答 (4)
2014-01-10 6:22 am
✔ 最佳答案
Be happy圖片參考：http://imgcld.yimg.com/8/n/HA00388954/o/20140109222142.jpg
如圖太細，可把滑鼠移至圖上，按右鍵，另存圖片到電腦上(例如桌面)，再在電腦上開啓，便會放大了。
2014-01-09 22:37:48 補充：
I wish you happy. ~~~~~~~~~~~
2014-01-09 23:03:31 補充：
批卷貓 :
What do you mean ?
2014-01-09 23:28:31 補充：
OK ! Thank You. ~~~~~~
2014-01-10 15:32:28 補充：
angles of elevation = 仰角
Angle of depression = 俯角
好似還有 angle of dip
應該是向上望。樹高。
2014-01-10 10:41 pm
到底 tree 高定 building 高，tree 有 15.72 米高？？五層樓高？？
2014-01-10 6:56 am
哦～
原來係老朋友～
2014-01-09 23:23:52 補充：
She added me before, and both me and you answered her questions in the past.
You can check her profile.
^__^
2014-01-10 00:05:29 補充：
http://hk.knowledge.yahoo.com/question/question?qid=7013092200115
http://hk.knowledge.yahoo.com/my/my_friend?show=HA09312420
Yahoo!知識+ 系統出了故障，我暫時未能改回我的原名。
原來係老朋友～
2014-01-09 23:23:52 補充：
She added me before, and both me and you answered her questions in the past.
You can check her profile.
^__^
2014-01-10 00:05:29 補充：
http://hk.knowledge.yahoo.com/question/question?qid=7013092200115
http://hk.knowledge.yahoo.com/my/my_friend?show=HA09312420
Yahoo!知識+ 系統出了故障，我暫時未能改回我的原名。
2014-01-10 6:31 am
why be happy...
2014-01-09 22:31:53 補充：
but thanks
2014-01-09 22:44:13 補充：
wish u happy too
2014-01-09 23:41:20 補充：
why i don’t remember = =...who are u...
2014-01-10 00:09:37 補充：
oic.....................
2014-01-09 22:31:53 補充：
but thanks
2014-01-09 22:44:13 補充：
wish u happy too
2014-01-09 23:41:20 補充：
why i don’t remember = =...who are u...
2014-01-10 00:09:37 補充：
oic.....................
收錄日期: 2021-04-27 20:37:37
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20140109000051KK00224