我想問點解呢一題既答案係呢個!!!我唔明啊<<<please解答我啊
(用中文回答)!!!thx!!
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數學困難<<<緊急
2008-06-11 7:54 pm
回答 (3)
2008-06-11 8:13 pm
3個角加埋會係180
所以...A + B + C = 180
2x + 3x + x = 180
x = 30
A = 60 C = 30
sin A = sin 60 = sqrt3/2
sin C = sin 30 = 0.5
sin C : sin A = 0.5 : sqrt3/2 = 1 : sqrt 3
所以...A + B + C = 180
2x + 3x + x = 180
x = 30
A = 60 C = 30
sin A = sin 60 = sqrt3/2
sin C = sin 30 = 0.5
sin C : sin A = 0.5 : sqrt3/2 = 1 : sqrt 3
2008-06-11 8:09 pm
angle A + angle B + angle C=180
angle A=180x2/6=60
angle B=180x3/6=90
angle C=180x1/6=30
sinc/sinA=1/2x2/(3)^0.5
= 1/(3)^0.5
the answer is D
angle A=180x2/6=60
angle B=180x3/6=90
angle C=180x1/6=30
sinc/sinA=1/2x2/(3)^0.5
= 1/(3)^0.5
the answer is D
收錄日期: 2021-04-29 20:25:34
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080611000051KK00613