As follows:
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math~~`
2010-01-31 10:07 pm
回答 (1)
2010-01-31 11:49 pm
✔ 最佳答案
tan θ = (AG - HG) / AB......*and
HG = AB = x cos θ , sub it to * :
tan θ = (l - x cos θ) / (x cos θ)
x sin θ = l - x cos θ
x (sin θ + cos θ) = l
x = l / (sin θ + cos θ)
收錄日期: 2021-04-21 22:07:48
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20100131000051KK02701