得一題=[]=
2007-06-19 7:29 am
回答 (2)
2007-06-19 7:42 am
✔ 最佳答案
3a) AQ = h / tan 20* m BQ = h / tan30* m
= √3 h m
b) AQ + BQ = 134
h / tan 20* + √3 h = 134
h = 29.9 ( cor. to 3.s.f. )
(* The Q has a typing mistake, AB should be 134m. )
參考: My Maths Knowledge
2007-06-19 6:04 pm
1a)tan20=PQ/AQ
AQ=PQ/tan20
tan30=PQ/BQ
BQ=PQ/tan30
=√3PQ
1b)AB=AQ+BQ
=√3PQ+PQ/tan20
=4.479528227PQ=134
PQ=29.91386441m
AQ=PQ/tan20
tan30=PQ/BQ
BQ=PQ/tan30
=√3PQ
1b)AB=AQ+BQ
=√3PQ+PQ/tan20
=4.479528227PQ=134
PQ=29.91386441m
收錄日期: 2021-04-13 00:49:57
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070618000051KK05275