cam you help to do this maths??
http://macao838.com/image/1204545577.jpg
the answer is 6.22m!!
你比個steps我啊!!!
application of trigonometry
2008-03-04 4:03 am
回答 (3)
2008-03-04 4:17 am
✔ 最佳答案
首先我們先加一個直各三角型AXDAX=BC=AB/tan33=25/tan33
DX=AXtan26=25tan26/tan33
DC=25-DX=25-25tan26/tan33
=6.22m
2008-03-05 2:58 am
你是從事什麼工作, 朋友?
2008-03-04 4:17 am
draw a point E above D and E is at the same height as A
DC=CE-DE
=25-BCtan26°----(1)
BCtan33°=25-----(2)
sub (2) into (1)
DC=25-(25/tan33°)tan26°
=6.22~
DC=CE-DE
=25-BCtan26°----(1)
BCtan33°=25-----(2)
sub (2) into (1)
DC=25-(25/tan33°)tan26°
=6.22~
收錄日期: 2021-04-11 16:18:28
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