Maths questions??(9)
回答 (1)
2007-01-28 8:48 pm
✔ 最佳答案
By sine law,a/sin A = b/sin B = c/sin C = 2R
(a,b,c是三角形的邊 ; A,B,C是三角形的角 ; A,B,C的對邊分別是a,b,c ; R是circumcircle的radius)
∴when R is constant,
length of the line is direct proportion with sin of the angle
2007-01-28 13:00:38 補充：
最後那行有些修正:length of the line is direct proportion with Sine of the angle
收錄日期: 2021-04-23 14:19:24
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