For a section of the graph y = a + b tan 2x (x in degree), it passes through the point (0,2) and the point (k , 0) where 0 < = x < = k (k in degree).
Which of the following is/are true ?
1. a > 0
2. b < 0
3. tan k degree = 1/b.
Maths
2015-04-04 2:56 am
回答 (3)
2015-04-04 3:51 am
✔ 最佳答案
y = a + b tan 2x
2=a+b tan 0
0=a+b tan k
2=a
0=2+b tan k
tan k=-2/b
1. a > 0 is true
2. b < 0 can't know
3. tan k degree = 1/b is false
so 1. a > 0 is true
2015-04-04 7:42 am
2015-04-04 4:50 am
其實呢題係唔係有圖?
話說 HKDSE 2013 有題同呢1題好似1樣
不過HKDSE哥題就有個圖
而 HKDSE 哥題 ans 係 1,2
話說 HKDSE 2013 有題同呢1題好似1樣
不過HKDSE哥題就有個圖
而 HKDSE 哥題 ans 係 1,2
收錄日期: 2021-04-15 18:56:44
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20150403000051KK00064