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Maths MC _ 1
2009-07-21 7:13 am
回答 (2)
2009-07-21 7:23 am
✔ 最佳答案
(18) -2 <= 2 sin x <= 22 <= 2 sin x + 4 <= 6
1/2 >= 1/(4 + 2 sin x) >= 1/3
3/2 >= 3/(4 + 2 sin x) >= 1
Ans = D
(8) Side length of a square = 12/√2 = 6√2 cm
So radius of the circle = 3√2 cm
(14) The points required are the intersection between the given graph and y = 13 which are (1, 13) and (3, 13)
參考: Myself
收錄日期: 2021-04-23 20:38:45
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20090720000051KK02463