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sin(90-Y)=1.33*sinY
X+Y=90

求X跟Y

2006-11-06 05:38:04 · 1 個解答 · 發問者 ? 2 in 電腦與網際網路 程式設計

1 個解答

sin(90-Y)=1.33*sinY → cosY=1.33*sinY → cosY/sinY=1.33 →  cotY=1.33 → tanY=1/1.33=0.7519Y=tan-10.7519≒37度X=90-Y≒53度

2006-11-06 10:59:58 補充:
三角函數表,請參考:http://tw.knowledge.yahoo.com/question/?qid=1305091716169

2006-11-06 05:58:18 · answer #1 · answered by ~~初學者六級~~ 7 · 0 0

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