Subsidiary angle:
1)Consider the equation k cos -2(cos x + sin x) = √5 ...........(‧)
(a) Show that cos(x + α) = √5/ ( √(k^2 - 4k + 8)) , where tan α = 2/(k-2)
(b) If (‧) has real solution(s) for x, find the ranges of values of k.
Multiple angle:
1)If sin θ = 3/5 and θ is obtuse, find the value of tan θ/2
請清楚列明點計
2條 f4 a-maths(subsidiary angle / multiple angle)
2008-02-24 5:15 am
回答 (1)
2008-02-24 6:51 am
✔ 最佳答案
As follows:圖片參考：http://i238.photobucket.com/albums/ff245/chocolate328154/Maths188.jpg?t=1203778257
參考: My Maths Knowledge
收錄日期: 2021-04-13 15:11:58
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