Referring to the figure , find x and y.
http://img695.imageshack.us/img695/5408/72258501.png
Trigonaometric relation
2010-01-24 8:06 pm
回答 (1)
2010-01-24 8:43 pm
✔ 最佳答案
圖片參考：http://img695.imageshack.us/img695/5408/72258501.png
x/y = tan60 = √3.....(1)
(x - 6√3) / y = tan30 = √3/3.....(2)
By (1) : y = x / √3 ,
sub it to (2) :
(x - 6√3) / (x/√3) = √3/3
x - 6√3 = x/3
x(1 - 1/3) = 6√3
x = 9√3
y = 9√3 / √3 = 9
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原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20100124000051KK00481