Rewirte CosX-3SinX =3 IN The form tanX=K
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SINX-2cos 4
B)hence cosX-3SINX =3 FOR 0<360
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sinX-2COSX 4
Maths,,,,,Final Question,,,,Help
2007-11-11 8:53 pm
回答 (1)
2007-11-11 9:00 pm
✔ 最佳答案
(cosx - 3sinx)/(sinx - 2cosx) = 3/4(1-3tanx) / (tanx - 2) = 3/4
4(1-3tanx) = 3(tanx - 2)
4 - 12tanx = 3 tan x - 6
10 = 15tanx
tanx = 2/3
(b) tanx = 2/3
x = 33.69 degrees or 213.69 degrees
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原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20071111000051KK01629